[PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree

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* [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
@ 2013-06-19  6:55 Chen Gang
  2013-06-19  7:10 ` Andrew Morton
  2013-06-19  8:53 ` Mel Gorman
  0 siblings, 2 replies; 9+ messages in thread
From: Chen Gang @ 2013-06-19  6:55 UTC (permalink / raw)
  To: Mel Gorman, hannes, riel, mhocko; +Cc: Andrew Morton, linux-mm, linux-kernel


'lru' may be used without initialized, so need regressing part of the
related patch.

The related patch:
  "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"


Signed-off-by: Chen Gang <gang.chen@asianux.com>
---
 mm/vmscan.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index fe73724..e92b1858 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -595,6 +595,7 @@ redo:
 		 * unevictable page on [in]active list.
 		 * We know how to handle that.
 		 */
+		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
 		lru_cache_add(page);
 	} else {
 		/*
-- 
1.7.7.6

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-06-19  6:55 [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree Chen Gang
@ 2013-06-19  7:10 ` Andrew Morton
  2013-06-19  7:19   ` Chen Gang
  2013-06-19  8:53 ` Mel Gorman
  1 sibling, 1 reply; 9+ messages in thread
From: Andrew Morton @ 2013-06-19  7:10 UTC (permalink / raw)
  To: Chen Gang; +Cc: Mel Gorman, hannes, riel, mhocko, linux-mm, linux-kernel

On Wed, 19 Jun 2013 14:55:13 +0800 Chen Gang <gang.chen@asianux.com> wrote:

> 
> 'lru' may be used without initialized, so need regressing part of the
> related patch.
> 
> The related patch:
>   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
>
> ...
>
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -595,6 +595,7 @@ redo:
>  		 * unevictable page on [in]active list.
>  		 * We know how to handle that.
>  		 */
> +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>  		lru_cache_add(page);
>  	} else {
>  		/*

That looks right.  Why the heck didn't gcc-4.4.4 (at least) warn about it?

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-06-19  7:10 ` Andrew Morton
@ 2013-06-19  7:19   ` Chen Gang
  2013-07-05  4:06     ` Chen Gang
  0 siblings, 1 reply; 9+ messages in thread
From: Chen Gang @ 2013-06-19  7:19 UTC (permalink / raw)
  To: Andrew Morton; +Cc: Mel Gorman, hannes, riel, mhocko, linux-mm, linux-kernel

On 06/19/2013 03:10 PM, Andrew Morton wrote:
> On Wed, 19 Jun 2013 14:55:13 +0800 Chen Gang <gang.chen@asianux.com> wrote:
> 
>> > 
>> > 'lru' may be used without initialized, so need regressing part of the
>> > related patch.
>> > 
>> > The related patch:
>> >   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
>> >
>> > ...
>> >
>> > --- a/mm/vmscan.c
>> > +++ b/mm/vmscan.c
>> > @@ -595,6 +595,7 @@ redo:
>> >  		 * unevictable page on [in]active list.
>> >  		 * We know how to handle that.
>> >  		 */
>> > +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>> >  		lru_cache_add(page);
>> >  	} else {
>> >  		/*
> That looks right.  Why the heck didn't gcc-4.4.4 (at least) warn about it?
> 

Sorry I don't know either, I find it by reading code, this time.

It is really necessary to continue analyzing why. In 2nd half of 2013, I
have planned to make some patches outside kernel but related with kernel
(e.g. LTP, gcc patches).

This kind of issue is a good chance for me to start in 2nd half of 2013
(start from next month).

So if no others reply for it, I will start analyzing it in the next
month, and plan to finish within a month (before 2013-07-31).


Welcome additional suggestions or completions.

Thanks.
-- 
Chen Gang

Asianux Corporation

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-06-19  7:19   ` Chen Gang
@ 2013-07-05  4:06     ` Chen Gang
  2013-07-08  6:43       ` Chen Gang
  0 siblings, 1 reply; 9+ messages in thread
From: Chen Gang @ 2013-07-05  4:06 UTC (permalink / raw)
  To: Andrew Morton; +Cc: Mel Gorman, hannes, riel, mhocko, linux-mm, linux-kernel

[-- Attachment #1: Type: text/plain, Size: 8983 bytes --]

On 06/19/2013 03:19 PM, Chen Gang wrote:
> On 06/19/2013 03:10 PM, Andrew Morton wrote:
>> On Wed, 19 Jun 2013 14:55:13 +0800 Chen Gang <gang.chen@asianux.com> wrote:
>>
>>>>
>>>> 'lru' may be used without initialized, so need regressing part of the
>>>> related patch.
>>>>
>>>> The related patch:
>>>>   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
>>>>
>>>> ...
>>>>
>>>> --- a/mm/vmscan.c
>>>> +++ b/mm/vmscan.c
>>>> @@ -595,6 +595,7 @@ redo:
>>>>  		 * unevictable page on [in]active list.
>>>>  		 * We know how to handle that.
>>>>  		 */
>>>> +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>>>>  		lru_cache_add(page);
>>>>  	} else {
>>>>  		/*
>> That looks right.  Why the heck didn't gcc-4.4.4 (at least) warn about it?
>>
> 
> Sorry I don't know either, I find it by reading code, this time.
> 
> It is really necessary to continue analyzing why. In 2nd half of 2013, I
> have planned to make some patches outside kernel but related with kernel
> (e.g. LTP, gcc patches).
> 
> This kind of issue is a good chance for me to start in 2nd half of 2013
> (start from next month).
> 
> So if no others reply for it, I will start analyzing it in the next
> month, and plan to finish within a month (before 2013-07-31).
> 
> 
> Welcome additional suggestions or completions.
> 
> Thanks.
> 

Under gcc 4.7.2 20120921 (Red Hat 4.7.2-2) also cause this issue.

The root cause is:

  for putback_lur_page() in mm/vmscan.c for next-20130621 tree.
  the compiler assumes "lru == LRU_UNEVICTABLE" instead of report warnings (uninitializing lru)

The details are below, and the related info and warn are in
attachments, please check, thanks.

Next, I will compile gcc compiler with the gcc latest code, if also has
this issue, I should communicate with gcc mailing list for it.

Thanks.

------------------------------analyzing begin---------------------------------

/* source code in mm/vmscan.c for next-20130621 */

 580 void putback_lru_page(struct page *page)
 581 {
 582         int lru;
 583         int was_unevictable = PageUnevictable(page);
 584 
 585         VM_BUG_ON(PageLRU(page));
 586 
 587 redo:
 588         ClearPageUnevictable(page);
 589 
 590         if (page_evictable(page)) {
 591                 /*
 592                  * For evictable pages, we can use the cache.
 593                  * In event of a race, worst case is we end up with an
 594                  * unevictable page on [in]active list.
 595                  * We know how to handle that.
 596                  */
 597                 lru_cache_add(page);
 598         } else {
 599                 /*
 600                  * Put unevictable pages directly on zone's unevictable
 601                  * list.
 602                  */
 603                 lru = LRU_UNEVICTABLE;
 604                 add_page_to_unevictable_list(page);
 605                 /*
 606                  * When racing with an mlock or AS_UNEVICTABLE clearing
 607                  * (page is unlocked) make sure that if the other thread
 608                  * does not observe our setting of PG_lru and fails
 609                  * isolation/check_move_unevictable_pages,
 610                  * we see PG_mlocked/AS_UNEVICTABLE cleared below and move
 611                  * the page back to the evictable list.
 612                  *
 613                  * The other side is TestClearPageMlocked() or shmem_lock().
 614                  */
 615                 smp_mb();
 616         }
 617 
 618         /*
 619          * page's status can change while we move it among lru. If an evictable
 620          * page is on unevictable list, it never be freed. To avoid that,
 621          * check after we added it to the list, again.
 622          */
 623         if (lru == LRU_UNEVICTABLE && page_evictable(page)) {
 624                 if (!isolate_lru_page(page)) {
 625                         put_page(page);
 626                         goto redo;
 627                 }
 628                 /* This means someone else dropped this page from LRU
 629                  * So, it will be freed or putback to LRU again. There is
 630                  * nothing to do here.
 631                  */
 632         }
 633 
 634         if (was_unevictable && lru != LRU_UNEVICTABLE)
 635                 count_vm_event(UNEVICTABLE_PGRESCUED);
 636         else if (!was_unevictable && lru == LRU_UNEVICTABLE)
 637                 count_vm_event(UNEVICTABLE_PGCULLED);
 638 
 639         put_page(page);         /* drop ref from isolate */
 640 }


/*
 * Related disassemble code:
 *   make defconfig under x86_64 PC.
 *   make menuconfig (choose "Automount devtmpfs at /dev..." and KGDB)
 *   make V=1 EXTRA_CFLAGS=-W (not find related warnings, ref warn.log in attachment)
 *   objdump -d vmlinux > vmlinux.S
 *   vi vmlinux.S
 *
 * The issue is: compiler assumes "lru == LRU_UNEVICTABLE" instead of report warnings (uninitializing lru)
 */

ffffffff810ffda0 <putback_lru_page>:
ffffffff810ffda0:	55                   	push   %rbp
ffffffff810ffda1:	48 89 e5             	mov    %rsp,%rbp
ffffffff810ffda4:	41 55                	push   %r13
ffffffff810ffda6:	41 54                	push   %r12
ffffffff810ffda8:	4c 8d 67 02          	lea    0x2(%rdi),%r12		; %r12 for ClearPageUnevictable(page);
ffffffff810ffdac:	53                   	push   %rbx
ffffffff810ffdad:	48 89 fb             	mov    %rdi,%rbx		; %rbx = page
ffffffff810ffdb0:	48 83 ec 08          	sub    $0x8,%rsp		; for lru, was_unevictable, but not used.

ffffffff810ffdb4:	4c 8b 2f             	mov    (%rdi),%r13		; %r13 = "was_unevictable = PageUnevictable(page);"
ffffffff810ffdb7:	49 c1 ed 14          	shr    $0x14,%r13
ffffffff810ffdbb:	41 83e5 01          	and    $0x1,%r13d
ffffffff810ffdbf:	90                   	nop

/* redo */
ffffffff810ffdc0:	f0 41 80 24 24 ef    	lock andb $0xef,(%r12)		; ClearPageUnevictable(page);

/* if (page_evictable(page)) { */
ffffffff810ffdc6:	48 89 df             	mov    %rbx,%rdi
ffffffff810ffdc9:	e8 92 ff ff ff       	callq  ffffffff810ffd60 <page_evictable>
ffffffff810ffdce:	85 c0                	test   %eax,%eax
ffffffff810ffdd0:	48 89 df             	mov    %rbx,%rdi
ffffffff810ffdd3:	74 0b                	je     ffffffff810ffde0 <putback_lru_page+0x40>

ffffffff810ffdd5:	e8 96 c5 ff ff       	callq  ffffffff810fc370 <lru_cache_add>
ffffffff810ffdda:	eb 0c                	jmp    ffffffff810ffde8 <putback_lru_page+0x48>
ffffffff810ffddc:	0f 1f 40 00          	nopl   0x0(%rax)

/* } else { */
						; assume lru == LRU_UNEVICTABLE
ffffffff810ffde0:	e8 ab c5 ff ff       	callq  ffffffff810fc390 <add_page_to_unevictable_list>
ffffffff810ffde5:	0f ae f0             	mfence 

/* } */

/* if (lru == LRU_UNEVICTABLE && page_evictable(page)) { */
ffffffff810ffde8:	48 89 df             	mov    %rbx,%rdi
ffffffff810ffdeb:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
ffffffff810ffdf0:	e8 6b ff ff ff       	callq  ffffffff810ffd60 <page_evictable>
ffffffff810ffdf5:	85 c0                	test   %eax,%eax
ffffffff810ffdf7:	74 1f                	je     ffffffff810ffe18 <putback_lru_page+0x78>  ; assume lru == LRU_UNEVICTABLE

ffffffff810ffdf9:	48 89 df             	mov    %rbx,%rdi
ffffffff810ffdfc:	e8 0f fb ff ff       	callq  ffffffff810ff910 <isolate_lru_page>
ffffffff810ffe01:	85 c0                	test   %eax,%eax
ffffffff810ffe03:	75 13                	jne    ffffffff810ffe18 <putback_lru_page+0x78>
ffffffff810ffe05:	48 89 df             	mov    %rbx,%rdi
ffffffff810ffe08:	e8 93 c0 ff ff       	callq  ffffffff810fbea0 <put_page>
ffffffff810ffe0d:	0f 1f 00             	nopl   (%rax)
ffffffff810ffe10:	eb ae                	jmp    ffffffff810ffdc0 <putback_lru_page+0x20>	; goto redo;
ffffffff810ffe12:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)

/* } */

/* if (was_unevictable && lru != LRU_UNEVICTABLE) */
	/* skip... */

/* else if (!was_unevictable && lru == LRU_UNEVICTABLE) */
ffffffff810ffe18:	4d 85 ed             	test   %r13,%r13		; !was_unevictable, and assume lru == LRU_UNEVICTABLE
ffffffff810ffe1b:	75 09                	jne    ffffffff810ffe26 <putback_lru_page+0x86>
ffffffff810ffe1d:	65 48 ff 04 25 68 f0 	incq   %gs:0xf068	; it is for count_vm_event(UNEVICTABLE_PGCULLED)
									; and "incq   %gs:0xf078" is for count_vm_event(UNEVICTABLE_PGRESCUED)
ffffffff810ffe24:	00 00 

/* put_page(); */
ffffffff810ffe26:	48 89 df             	mov    %rbx,%rdi
ffffffff810ffe29:	e8 72 c0 ff ff       	callq  ffffffff810fbea0 <put_page>
ffffffff810ffe2e:	48 83 c4 08          	add    $0x8,%rsp
ffffffff810ffe32:	5b                   	pop    %rbx
ffffffff810ffe33:	41 5c                	pop    %r12
ffffffff810ffe35:	41 5d                	pop    %r13
ffffffff810ffe37:	5d                   	pop    %rbp
ffffffff810ffe38:	c3                   	retq   
ffffffff810ffe39:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)


------------------------------analyzing end-----------------------------------



Thanks.
-- 
Chen Gang

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: info.log --]
[-- Type: text/x-log; name="info.log", Size: 2368 bytes --]


[root@dhcp122 linux-next]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.7.2/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --disable-build-with-cxx --disable-build-poststage1-with-cxx --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.7.2 20120921 (Red Hat 4.7.2-2) (GCC) 


  gcc -Wp,-MD,mm/.vmscan.o.d  -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/4.7.2/include -I/root/linux-next/arch/x86/include -Iarch/x86/include/generated  -Iinclude -I/root/linux-next/arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I/root/linux-next/include/uapi -Iinclude/generated/uapi -include /root/linux-next/include/linux/kconfig.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -O2 -m64 -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -Wframe-larger-than=2048 -fno-stack-protector -Wno-unused-but-set-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -DCC_HAVE_ASM_GOTO -W    -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(vmscan)"  -D"KBUILD_MODNAME=KBUILD_STR(vmscan)" -c -o mm/vmscan.o mm/vmscan.c


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #3: warn.log --]
[-- Type: text/x-log; name="warn.log", Size: 101134 bytes --]

In file included from /root/linux-next/arch/x86/include/asm/bitops.h:16:0,
                 from include/linux/bitops.h:22,
                 from include/linux/kernel.h:10,
                 from include/asm-generic/bug.h:13,
                 from /root/linux-next/arch/x86/include/asm/bug.h:38,
                 from include/linux/bug.h:4,
                 from include/linux/thread_info.h:11,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/alternative.h: In function a??apply_paravirta??:
/root/linux-next/arch/x86/include/asm/alternative.h:203:63: warning: unused parameter a??starta?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/alternative.h:204:35: warning: unused parameter a??enda?? [-Wunused-parameter]
In file included from include/linux/kernel.h:13:0,
                 from include/asm-generic/bug.h:13,
                 from /root/linux-next/arch/x86/include/asm/bug.h:38,
                 from include/linux/bug.h:4,
                 from include/linux/thread_info.h:11,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/printk.h: In function a??no_printka??:
include/linux/printk.h:95:27: warning: unused parameter a??fmta?? [-Wunused-parameter]
In file included from include/linux/kernel.h:14:0,
                 from include/asm-generic/bug.h:13,
                 from /root/linux-next/arch/x86/include/asm/bug.h:38,
                 from include/linux/bug.h:4,
                 from include/linux/thread_info.h:11,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/dynamic_debug.h: In function a??ddebug_remove_modulea??:
include/linux/dynamic_debug.h:114:52: warning: unused parameter a??moda?? [-Wunused-parameter]
include/linux/dynamic_debug.h: In function a??ddebug_dyndbg_module_param_cba??:
include/linux/dynamic_debug.h:119:68: warning: unused parameter a??vala?? [-Wunused-parameter]
include/linux/dynamic_debug.h:120:19: warning: unused parameter a??modnamea?? [-Wunused-parameter]
In file included from include/asm-generic/bug.h:13:0,
                 from /root/linux-next/arch/x86/include/asm/bug.h:38,
                 from include/linux/bug.h:4,
                 from include/linux/thread_info.h:11,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/kernel.h: In function a??__might_sleepa??:
include/linux/kernel.h:166:48: warning: unused parameter a??filea?? [-Wunused-parameter]
include/linux/kernel.h:166:58: warning: unused parameter a??linea?? [-Wunused-parameter]
include/linux/kernel.h:167:12: warning: unused parameter a??preempt_offseta?? [-Wunused-parameter]
include/linux/kernel.h: In function a??____trace_printk_check_formata??:
include/linux/kernel.h:496:48: warning: unused parameter a??fmta?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/thread_info.h:11:0,
                 from include/linux/thread_info.h:54,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/page.h: In function a??clear_user_pagea??:
/root/linux-next/arch/x86/include/asm/page.h:24:62: warning: unused parameter a??vaddra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/page.h:25:21: warning: unused parameter a??pga?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/page.h: In function a??copy_user_pagea??:
/root/linux-next/arch/x86/include/asm/page.h:30:71: warning: unused parameter a??vaddra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/page.h:31:20: warning: unused parameter a??topagea?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/vm86.h:5:0,
                 from /root/linux-next/arch/x86/include/asm/processor.h:10,
                 from /root/linux-next/arch/x86/include/asm/thread_info.h:22,
                 from include/linux/thread_info.h:54,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/ptrace.h: In function a??v8086_modea??:
/root/linux-next/arch/x86/include/asm/ptrace.h:113:46: warning: unused parameter a??regsa?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/processor.h:10:0,
                 from /root/linux-next/arch/x86/include/asm/thread_info.h:22,
                 from include/linux/thread_info.h:54,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/vm86.h: In function a??handle_vm86_trapa??:
/root/linux-next/arch/x86/include/asm/vm86.h:75:61: warning: unused parameter a??aa?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/vm86.h:75:69: warning: unused parameter a??ba?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/vm86.h:75:76: warning: unused parameter a??ca?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/cpumask.h:4:0,
                 from /root/linux-next/arch/x86/include/asm/msr.h:10,
                 from /root/linux-next/arch/x86/include/asm/processor.h:20,
                 from /root/linux-next/arch/x86/include/asm/thread_info.h:22,
                 from include/linux/thread_info.h:54,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/cpumask.h: In function a??alloc_cpumask_vara??:
include/linux/cpumask.h:676:53: warning: unused parameter a??maska?? [-Wunused-parameter]
include/linux/cpumask.h:676:65: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??alloc_cpumask_var_nodea??:
include/linux/cpumask.h:681:58: warning: unused parameter a??maska?? [-Wunused-parameter]
include/linux/cpumask.h:681:70: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/cpumask.h:682:12: warning: unused parameter a??nodea?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??zalloc_cpumask_vara??:
include/linux/cpumask.h:687:66: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??zalloc_cpumask_var_nodea??:
include/linux/cpumask.h:693:71: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/cpumask.h:694:12: warning: unused parameter a??nodea?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??alloc_bootmem_cpumask_vara??:
include/linux/cpumask.h:700:61: warning: unused parameter a??maska?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??free_cpumask_vara??:
include/linux/cpumask.h:704:51: warning: unused parameter a??maska?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??free_bootmem_cpumask_vara??:
include/linux/cpumask.h:708:59: warning: unused parameter a??maska?? [-Wunused-parameter]
include/linux/cpumask.h: In function a??__check_is_bitmapa??:
include/linux/cpumask.h:748:58: warning: unused parameter a??bitmapa?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/thread_info.h:22:0,
                 from include/linux/thread_info.h:54,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/processor.h: In function a??native_set_iopl_maska??:
/root/linux-next/arch/x86/include/asm/processor.h:496:50: warning: unused parameter a??maska?? [-Wunused-parameter]
In file included from include/linux/spinlock_types.h:18:0,
                 from include/linux/spinlock.h:81,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/lockdep.h: In function a??print_irqtrace_eventsa??:
include/linux/lockdep.h:465:62: warning: unused parameter a??curra?? [-Wunused-parameter]
In file included from include/linux/spinlock.h:87:0,
                 from include/linux/mmzone.h:7,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/spinlock.h: In function a??arch_spin_lock_flagsa??:
/root/linux-next/arch/x86/include/asm/spinlock.h:127:23: warning: unused parameter a??flagsa?? [-Wunused-parameter]
In file included from include/linux/mmzone.h:9:0,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/wait.h: In function a??__remove_wait_queuea??:
include/linux/wait.h:137:59: warning: unused parameter a??heada?? [-Wunused-parameter]
In file included from include/linux/notifier.h:13:0,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/mutex.h: In function a??mutex_destroya??:
include/linux/mutex.h:98:48: warning: unused parameter a??locka?? [-Wunused-parameter]
In file included from include/linux/rwsem.h:40:0,
                 from include/linux/notifier.h:14,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/rwsem.h: In function a??__down_write_nesteda??:
/root/linux-next/arch/x86/include/asm/rwsem.h:102:70: warning: unused parameter a??subclassa?? [-Wunused-parameter]
In file included from include/linux/rcupdate.h:44:0,
                 from include/linux/srcu.h:33,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/debugobjects.h: In function a??debug_object_inita??:
include/linux/debugobjects.h:85:31: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:85:61: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_object_init_on_stacka??:
include/linux/debugobjects.h:87:34: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:87:64: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_object_activatea??:
include/linux/debugobjects.h:89:31: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:89:61: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_object_deactivatea??:
include/linux/debugobjects.h:91:31: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:91:61: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_object_destroya??:
include/linux/debugobjects.h:93:31: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:93:61: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_object_freea??:
include/linux/debugobjects.h:95:31: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:95:61: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_object_assert_inita??:
include/linux/debugobjects.h:97:32: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/debugobjects.h:97:62: warning: unused parameter a??descra?? [-Wunused-parameter]
include/linux/debugobjects.h: In function a??debug_check_no_obj_freeda??:
include/linux/debugobjects.h:107:38: warning: unused parameter a??addressa?? [-Wunused-parameter]
include/linux/debugobjects.h:107:61: warning: unused parameter a??sizea?? [-Wunused-parameter]
In file included from include/linux/srcu.h:33:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/rcupdate.h: In function a??rcu_user_hooks_switcha??:
include/linux/rcupdate.h:239:62: warning: unused parameter a??preva?? [-Wunused-parameter]
include/linux/rcupdate.h:240:27: warning: unused parameter a??nexta?? [-Wunused-parameter]
In file included from include/linux/srcu.h:33:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/rcupdate.h: In function a??init_rcu_head_on_stacka??:
include/linux/rcupdate.h:295:60: warning: unused parameter a??heada?? [-Wunused-parameter]
include/linux/rcupdate.h: In function a??destroy_rcu_head_on_stacka??:
include/linux/rcupdate.h:299:63: warning: unused parameter a??heada?? [-Wunused-parameter]
include/linux/rcupdate.h: In function a??rcu_is_nocb_cpua??:
include/linux/rcupdate.h:1014:40: warning: unused parameter a??cpua?? [-Wunused-parameter]
In file included from include/linux/workqueue.h:8:0,
                 from include/linux/srcu.h:34,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/timer.h: In function a??destroy_timer_on_stacka??:
include/linux/timer.h:103:62: warning: unused parameter a??timera?? [-Wunused-parameter]
In file included from include/linux/srcu.h:34:0,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/workqueue.h: In function a??__init_worka??:
include/linux/workqueue.h:199:52: warning: unused parameter a??worka?? [-Wunused-parameter]
include/linux/workqueue.h:199:62: warning: unused parameter a??onstacka?? [-Wunused-parameter]
include/linux/workqueue.h: In function a??destroy_work_on_stacka??:
include/linux/workqueue.h:200:62: warning: unused parameter a??worka?? [-Wunused-parameter]
include/linux/workqueue.h: In function a??work_statica??:
include/linux/workqueue.h:201:60: warning: unused parameter a??worka?? [-Wunused-parameter]
In file included from include/linux/notifier.h:15:0,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:797,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/srcu.h: In function a??srcu_read_lock_helda??:
include/linux/srcu.h:167:59: warning: unused parameter a??spa?? [-Wunused-parameter]
In file included from include/linux/mmzone.h:797:0,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/memory_hotplug.h: In function a??pgdat_resize_locka??:
include/linux/memory_hotplug.h:201:58: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/memory_hotplug.h:201:76: warning: unused parameter a??fa?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??pgdat_resize_unlocka??:
include/linux/memory_hotplug.h:202:60: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/memory_hotplug.h:202:78: warning: unused parameter a??fa?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??pgdat_resize_inita??:
include/linux/memory_hotplug.h:203:58: warning: unused parameter a??pgdata?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??zone_span_seqbegina??:
include/linux/memory_hotplug.h:205:56: warning: unused parameter a??zonea?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??zone_span_seqretrya??:
include/linux/memory_hotplug.h:209:51: warning: unused parameter a??zonea?? [-Wunused-parameter]
include/linux/memory_hotplug.h:209:66: warning: unused parameter a??iva?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??zone_span_writelocka??:
include/linux/memory_hotplug.h:213:53: warning: unused parameter a??zonea?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??zone_span_writeunlocka??:
include/linux/memory_hotplug.h:214:55: warning: unused parameter a??zonea?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??zone_seqlock_inita??:
include/linux/memory_hotplug.h:215:51: warning: unused parameter a??zonea?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??register_page_bootmem_info_nodea??:
include/linux/memory_hotplug.h:224:72: warning: unused parameter a??pgdata?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??is_mem_section_removablea??:
include/linux/memory_hotplug.h:241:58: warning: unused parameter a??pfna?? [-Wunused-parameter]
include/linux/memory_hotplug.h:242:20: warning: unused parameter a??nr_pagesa?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??try_offline_nodea??:
include/linux/memory_hotplug.h:247:41: warning: unused parameter a??nida?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??offline_pagesa??:
include/linux/memory_hotplug.h:249:47: warning: unused parameter a??start_pfna?? [-Wunused-parameter]
include/linux/memory_hotplug.h:249:72: warning: unused parameter a??nr_pagesa?? [-Wunused-parameter]
include/linux/memory_hotplug.h: In function a??remove_memorya??:
include/linux/memory_hotplug.h:254:38: warning: unused parameter a??nida?? [-Wunused-parameter]
include/linux/memory_hotplug.h:254:47: warning: unused parameter a??starta?? [-Wunused-parameter]
include/linux/memory_hotplug.h:254:58: warning: unused parameter a??sizea?? [-Wunused-parameter]
In file included from include/linux/gfp.h:4:0,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/mmzone.h: In function a??is_highmem_idxa??:
include/linux/mmzone.h:865:49: warning: unused parameter a??idxa?? [-Wunused-parameter]
include/linux/mmzone.h: In function a??is_highmema??:
include/linux/mmzone.h:881:43: warning: unused parameter a??zonea?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/uapi/asm/bootparam.h:33:0,
                 from /root/linux-next/arch/x86/include/asm/x86_init.h:5,
                 from /root/linux-next/arch/x86/include/asm/mpspec.h:7,
                 from /root/linux-next/arch/x86/include/asm/smp.h:12,
                 from /root/linux-next/arch/x86/include/asm/mmzone_64.h:10,
                 from /root/linux-next/arch/x86/include/asm/mmzone.h:4,
                 from include/linux/mmzone.h:920,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/e820.h: In function a??early_memtesta??:
/root/linux-next/arch/x86/include/asm/e820.h:48:48: warning: unused parameter a??starta?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/e820.h:48:69: warning: unused parameter a??enda?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/numa.h:6:0,
                 from /root/linux-next/arch/x86/include/asm/acpi.h:28,
                 from /root/linux-next/arch/x86/include/asm/fixmap.h:19,
                 from /root/linux-next/arch/x86/include/asm/apic.h:12,
                 from /root/linux-next/arch/x86/include/asm/smp.h:13,
                 from /root/linux-next/arch/x86/include/asm/mmzone_64.h:10,
                 from /root/linux-next/arch/x86/include/asm/mmzone.h:4,
                 from include/linux/mmzone.h:920,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/topology.h: In function a??arch_fix_phys_package_ida??:
/root/linux-next/arch/x86/include/asm/topology.h:132:49: warning: unused parameter a??numa?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/topology.h:132:58: warning: unused parameter a??slota?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/smp.h:13:0,
                 from /root/linux-next/arch/x86/include/asm/mmzone_64.h:10,
                 from /root/linux-next/arch/x86/include/asm/mmzone.h:4,
                 from include/linux/mmzone.h:920,
                 from include/linux/gfp.h:4,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/apic.h: In function a??flat_vector_allocation_domaina??:
/root/linux-next/arch/x86/include/asm/apic.h:622:35: warning: unused parameter a??cpua?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/apic.h:623:32: warning: unused parameter a??maska?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/apic.h: In function a??default_vector_allocation_domaina??:
/root/linux-next/arch/x86/include/asm/apic.h:639:28: warning: unused parameter a??maska?? [-Wunused-parameter]
In file included from include/linux/gfp.h:4:0,
                 from include/linux/mm.h:8,
                 from mm/vmscan.c:14:
include/linux/mmzone.h: In function a??memmap_valid_withina??:
include/linux/mmzone.h:1271:53: warning: unused parameter a??pfna?? [-Wunused-parameter]
include/linux/mmzone.h:1272:19: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mmzone.h:1272:38: warning: unused parameter a??zonea?? [-Wunused-parameter]
In file included from include/linux/mm.h:8:0,
                 from mm/vmscan.c:14:
include/linux/gfp.h: In function a??arch_free_pagea??:
include/linux/gfp.h:293:48: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/gfp.h:293:58: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/gfp.h: In function a??arch_alloc_pagea??:
include/linux/gfp.h:296:49: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/gfp.h:296:59: warning: unused parameter a??ordera?? [-Wunused-parameter]
In file included from include/linux/mm.h:14:0,
                 from mm/vmscan.c:14:
include/linux/debug_locks.h: In function a??debug_show_held_locksa??:
include/linux/debug_locks.h:60:62: warning: unused parameter a??taska?? [-Wunused-parameter]
include/linux/debug_locks.h: In function a??debug_check_no_locks_freeda??:
include/linux/debug_locks.h:65:40: warning: unused parameter a??froma?? [-Wunused-parameter]
include/linux/debug_locks.h:65:60: warning: unused parameter a??lena?? [-Wunused-parameter]
In file included from include/linux/mm_types.h:14:0,
                 from include/linux/mm.h:15,
                 from mm/vmscan.c:14:
include/linux/uprobes.h: In function a??uprobe_registera??:
include/linux/uprobes.h:132:31: warning: unused parameter a??inodea?? [-Wunused-parameter]
include/linux/uprobes.h:132:45: warning: unused parameter a??offseta?? [-Wunused-parameter]
include/linux/uprobes.h:132:77: warning: unused parameter a??uca?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_applya??:
include/linux/uprobes.h:137:28: warning: unused parameter a??inodea?? [-Wunused-parameter]
include/linux/uprobes.h:137:42: warning: unused parameter a??offseta?? [-Wunused-parameter]
include/linux/uprobes.h:137:74: warning: unused parameter a??uca?? [-Wunused-parameter]
include/linux/uprobes.h:137:83: warning: unused parameter a??adda?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_unregistera??:
include/linux/uprobes.h:142:33: warning: unused parameter a??inodea?? [-Wunused-parameter]
include/linux/uprobes.h:142:47: warning: unused parameter a??offseta?? [-Wunused-parameter]
include/linux/uprobes.h:142:79: warning: unused parameter a??uca?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_mmapa??:
include/linux/uprobes.h:145:54: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_munmapa??:
include/linux/uprobes.h:150:38: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/uprobes.h:150:57: warning: unused parameter a??starta?? [-Wunused-parameter]
include/linux/uprobes.h:150:78: warning: unused parameter a??enda?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_dup_mmapa??:
include/linux/uprobes.h:160:35: warning: unused parameter a??oldmma?? [-Wunused-parameter]
include/linux/uprobes.h:160:60: warning: unused parameter a??newmma?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_notify_resumea??:
include/linux/uprobes.h:163:57: warning: unused parameter a??regsa?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_get_swbp_addra??:
include/linux/uprobes.h:170:66: warning: unused parameter a??regsa?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_free_utaska??:
include/linux/uprobes.h:174:58: warning: unused parameter a??ta?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_copy_processa??:
include/linux/uprobes.h:177:60: warning: unused parameter a??ta?? [-Wunused-parameter]
include/linux/uprobes.h: In function a??uprobe_clear_statea??:
include/linux/uprobes.h:180:57: warning: unused parameter a??mma?? [-Wunused-parameter]
In file included from include/linux/mm.h:15:0,
                 from mm/vmscan.c:14:
include/linux/mm_types.h: In function a??mm_init_cpumaska??:
include/linux/mm_types.h:443:54: warning: unused parameter a??mma?? [-Wunused-parameter]
In file included from mm/vmscan.c:14:0:
include/linux/mm.h: In function a??set_max_mapnra??:
include/linux/mm.h:36:48: warning: unused parameter a??limita?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/pgtable.h:413:0,
                 from include/linux/mm.h:50,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/pgtable_64.h: In function a??native_pte_cleara??:
/root/linux-next/arch/x86/include/asm/pgtable_64.h:46:55: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable_64.h:46:73: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable_64.h: In function a??pgd_largea??:
/root/linux-next/arch/x86/include/asm/pgtable_64.h:128:35: warning: unused parameter a??pgda?? [-Wunused-parameter]
In file included from include/linux/mm.h:50:0,
                 from mm/vmscan.c:14:
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??native_set_pte_ata??:
/root/linux-next/arch/x86/include/asm/pgtable.h:665:56: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:665:74: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??native_set_pmd_ata??:
/root/linux-next/arch/x86/include/asm/pgtable.h:671:56: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:671:74: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??ptep_get_and_cleara??:
/root/linux-next/arch/x86/include/asm/pgtable.h:718:58: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:718:76: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??ptep_set_wrprotecta??:
/root/linux-next/arch/x86/include/asm/pgtable.h:745:57: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:746:25: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??pmdp_get_and_cleara??:
/root/linux-next/arch/x86/include/asm/pgtable.h:781:58: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:781:76: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??pmdp_set_wrprotecta??:
/root/linux-next/arch/x86/include/asm/pgtable.h:790:57: warning: unused parameter a??mma?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:791:25: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??update_mmu_cachea??:
/root/linux-next/arch/x86/include/asm/pgtable.h:830:60: warning: unused parameter a??vmaa?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:831:17: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:831:30: warning: unused parameter a??ptepa?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h: In function a??update_mmu_cache_pmda??:
/root/linux-next/arch/x86/include/asm/pgtable.h:834:64: warning: unused parameter a??vmaa?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:835:17: warning: unused parameter a??addra?? [-Wunused-parameter]
/root/linux-next/arch/x86/include/asm/pgtable.h:835:30: warning: unused parameter a??pmda?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/pgtable.h:839:0,
                 from include/linux/mm.h:50,
                 from mm/vmscan.c:14:
include/asm-generic/pgtable.h: In function a??pte_clear_not_present_fulla??:
include/asm-generic/pgtable.h:126:16: warning: unused parameter a??fulla?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??pmd_samea??:
include/asm-generic/pgtable.h:203:34: warning: unused parameter a??pmd_aa?? [-Wunused-parameter]
include/asm-generic/pgtable.h:203:47: warning: unused parameter a??pmd_ba?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??my_zero_pfna??:
include/asm-generic/pgtable.h:496:55: warning: unused parameter a??addra?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??pmd_trans_hugea??:
include/asm-generic/pgtable.h:506:40: warning: unused parameter a??pmda?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??pmd_trans_splittinga??:
include/asm-generic/pgtable.h:510:45: warning: unused parameter a??pmda?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??pmd_trans_unstablea??:
include/asm-generic/pgtable.h:599:45: warning: unused parameter a??pmda?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??pmd_numaa??:
include/asm-generic/pgtable.h:683:34: warning: unused parameter a??pmda?? [-Wunused-parameter]
include/asm-generic/pgtable.h: In function a??pte_numaa??:
include/asm-generic/pgtable.h:688:34: warning: unused parameter a??ptea?? [-Wunused-parameter]
In file included from include/linux/mm.h:271:0,
                 from mm/vmscan.c:14:
include/linux/page-flags.h: In function a??PageHighMema??:
include/linux/page-flags.h:242:1: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/page-flags.h: In function a??PageHWPoisona??:
include/linux/page-flags.h:274:1: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/page-flags.h: In function a??PageTransHugea??:
include/linux/page-flags.h:439:46: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/page-flags.h: In function a??PageTransCompounda??:
include/linux/page-flags.h:444:50: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/page-flags.h: In function a??PageTransTaila??:
include/linux/page-flags.h:449:46: warning: unused parameter a??pagea?? [-Wunused-parameter]
In file included from include/linux/mm.h:272:0,
                 from mm/vmscan.c:14:
include/linux/huge_mm.h: In function a??split_huge_page_to_lista??:
include/linux/huge_mm.h:194:38: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/huge_mm.h:194:62: warning: unused parameter a??lista?? [-Wunused-parameter]
include/linux/huge_mm.h: In function a??split_huge_pagea??:
include/linux/huge_mm.h:198:48: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/huge_mm.h: In function a??hugepage_madvisea??:
include/linux/huge_mm.h:209:59: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/huge_mm.h:210:23: warning: unused parameter a??vm_flagsa?? [-Wunused-parameter]
include/linux/huge_mm.h:210:37: warning: unused parameter a??advicea?? [-Wunused-parameter]
include/linux/huge_mm.h: In function a??vma_adjust_trans_hugea??:
include/linux/huge_mm.h:215:65: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/huge_mm.h:216:21: warning: unused parameter a??starta?? [-Wunused-parameter]
include/linux/huge_mm.h:217:21: warning: unused parameter a??enda?? [-Wunused-parameter]
include/linux/huge_mm.h:218:12: warning: unused parameter a??adjust_nexta?? [-Wunused-parameter]
include/linux/huge_mm.h: In function a??pmd_trans_huge_locka??:
include/linux/huge_mm.h:221:46: warning: unused parameter a??pmda?? [-Wunused-parameter]
include/linux/huge_mm.h:222:34: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/huge_mm.h: In function a??do_huge_pmd_numa_pagea??:
include/linux/huge_mm.h:227:59: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/huge_mm.h:227:86: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/huge_mm.h:228:20: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/huge_mm.h:228:32: warning: unused parameter a??pmda?? [-Wunused-parameter]
include/linux/huge_mm.h:228:44: warning: unused parameter a??pmdpa?? [-Wunused-parameter]
In file included from mm/vmscan.c:14:0:
include/linux/mm.h: In function a??compound_locka??:
include/linux/mm.h:336:47: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h: In function a??compound_unlocka??:
include/linux/mm.h:344:49: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h: In function a??compound_lock_irqsavea??:
include/linux/mm.h:352:64: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h: In function a??compound_unlock_irqrestorea??:
include/linux/mm.h:362:60: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h:363:26: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/mm.h: In function a??page_nid_xchg_lasta??:
include/linux/mm.h:708:61: warning: unused parameter a??nida?? [-Wunused-parameter]
include/linux/mm.h: In function a??page_nid_reset_lasta??:
include/linux/mm.h:718:53: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h: In function a??set_page_linksa??:
include/linux/mm.h:754:36: warning: unused parameter a??pfna?? [-Wunused-parameter]
In file included from include/linux/mm.h:766:0,
                 from mm/vmscan.c:14:
include/linux/vmstat.h: In function a??__mod_zone_freepage_statea??:
include/linux/vmstat.h:264:15: warning: unused parameter a??migratetypea?? [-Wunused-parameter]
In file included from mm/vmscan.c:14:0:
include/linux/mm.h: In function a??kernel_map_pagesa??:
include/linux/mm.h:1745:31: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h:1745:41: warning: unused parameter a??numpagesa?? [-Wunused-parameter]
include/linux/mm.h:1745:55: warning: unused parameter a??enablea?? [-Wunused-parameter]
include/linux/mm.h: In function a??kernel_page_presenta??:
include/linux/mm.h:1747:53: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/mm.h: In function a??page_is_guarda??:
include/linux/mm.h:1842:47: warning: unused parameter a??pagea?? [-Wunused-parameter]
In file included from include/linux/stat.h:19:0,
                 from include/linux/module.h:10,
                 from mm/vmscan.c:15:
include/linux/uidgid.h: In function a??make_kuida??:
include/linux/uidgid.h:152:55: warning: unused parameter a??froma?? [-Wunused-parameter]
include/linux/uidgid.h: In function a??make_kgida??:
include/linux/uidgid.h:157:55: warning: unused parameter a??froma?? [-Wunused-parameter]
include/linux/uidgid.h: In function a??from_kuida??:
include/linux/uidgid.h:162:54: warning: unused parameter a??toa?? [-Wunused-parameter]
include/linux/uidgid.h: In function a??from_kgida??:
include/linux/uidgid.h:167:54: warning: unused parameter a??toa?? [-Wunused-parameter]
include/linux/uidgid.h: In function a??kuid_has_mappinga??:
include/linux/uidgid.h:188:60: warning: unused parameter a??nsa?? [-Wunused-parameter]
include/linux/uidgid.h:188:71: warning: unused parameter a??uida?? [-Wunused-parameter]
include/linux/uidgid.h: In function a??kgid_has_mappinga??:
include/linux/uidgid.h:193:60: warning: unused parameter a??nsa?? [-Wunused-parameter]
include/linux/uidgid.h:193:71: warning: unused parameter a??gida?? [-Wunused-parameter]
In file included from include/linux/module.h:14:0,
                 from mm/vmscan.c:15:
include/linux/elf.h: In function a??elf_coredump_extra_notes_writea??:
include/linux/elf.h:45:63: warning: unused parameter a??filea?? [-Wunused-parameter]
include/linux/elf.h:46:12: warning: unused parameter a??foffseta?? [-Wunused-parameter]
In file included from include/linux/module.h:17:0,
                 from mm/vmscan.c:15:
include/linux/moduleparam.h: In function a??__check_old_set_parama??:
include/linux/moduleparam.h:197:29: warning: unused parameter a??oldseta?? [-Wunused-parameter]
In file included from include/linux/static_key.h:1:0,
                 from include/linux/tracepoint.h:20,
                 from include/linux/module.h:18,
                 from mm/vmscan.c:15:
include/linux/jump_label.h: In function a??jump_label_text_reserveda??:
include/linux/jump_label.h:177:50: warning: unused parameter a??starta?? [-Wunused-parameter]
include/linux/jump_label.h:177:63: warning: unused parameter a??enda?? [-Wunused-parameter]
include/linux/jump_label.h: In function a??jump_label_apply_nopsa??:
include/linux/jump_label.h:185:56: warning: unused parameter a??moda?? [-Wunused-parameter]
include/linux/jump_label.h: In function a??jump_label_rate_limita??:
include/linux/jump_label.h:191:51: warning: unused parameter a??keya?? [-Wunused-parameter]
include/linux/jump_label.h:192:17: warning: unused parameter a??rla?? [-Wunused-parameter]
In file included from include/linux/hardirq.h:7:0,
                 from include/linux/interrupt.h:12,
                 from include/linux/kernel_stat.h:8,
                 from mm/vmscan.c:17:
include/linux/vtime.h: In function a??vtime_task_switcha??:
include/linux/vtime.h:19:58: warning: unused parameter a??preva?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_account_systema??:
include/linux/vtime.h:20:61: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_account_usera??:
include/linux/vtime.h:21:59: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_account_irq_entera??:
include/linux/vtime.h:22:64: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_user_entera??:
include/linux/vtime.h:44:57: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_user_exita??:
include/linux/vtime.h:45:56: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_guest_entera??:
include/linux/vtime.h:46:58: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_guest_exita??:
include/linux/vtime.h:47:57: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h: In function a??vtime_init_idlea??:
include/linux/vtime.h:48:56: warning: unused parameter a??tska?? [-Wunused-parameter]
include/linux/vtime.h:48:65: warning: unused parameter a??cpua?? [-Wunused-parameter]
include/linux/vtime.h: In function a??irqtime_account_irqa??:
include/linux/vtime.h:54:60: warning: unused parameter a??tska?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/sections.h:4:0,
                 from /root/linux-next/arch/x86/include/asm/hw_irq.h:26,
                 from include/linux/irq.h:363,
                 from /root/linux-next/arch/x86/include/asm/hardirq.h:5,
                 from include/linux/hardirq.h:8,
                 from include/linux/interrupt.h:12,
                 from include/linux/kernel_stat.h:8,
                 from mm/vmscan.c:17:
include/asm-generic/sections.h: In function a??arch_is_kernel_texta??:
include/asm-generic/sections.h:49:53: warning: unused parameter a??addra?? [-Wunused-parameter]
include/asm-generic/sections.h: In function a??arch_is_kernel_dataa??:
include/asm-generic/sections.h:56:53: warning: unused parameter a??addra?? [-Wunused-parameter]
In file included from /root/linux-next/arch/x86/include/asm/hardirq.h:5:0,
                 from include/linux/hardirq.h:8,
                 from include/linux/interrupt.h:12,
                 from include/linux/kernel_stat.h:8,
                 from mm/vmscan.c:17:
include/linux/irq.h: In function a??irq_set_parenta??:
include/linux/irq.h:400:38: warning: unused parameter a??irqa?? [-Wunused-parameter]
include/linux/irq.h:400:47: warning: unused parameter a??parent_irqa?? [-Wunused-parameter]
In file included from include/linux/interrupt.h:16:0,
                 from include/linux/kernel_stat.h:8,
                 from mm/vmscan.c:17:
include/linux/hrtimer.h: In function a??destroy_hrtimer_on_stacka??:
include/linux/hrtimer.h:356:61: warning: unused parameter a??timera?? [-Wunused-parameter]
In file included from include/linux/kernel_stat.h:8:0,
                 from mm/vmscan.c:17:
include/linux/interrupt.h: In function a??disable_irq_nosync_lockdep_irqsavea??:
include/linux/interrupt.h:312:88: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/interrupt.h: In function a??enable_irq_lockdep_irqrestorea??:
include/linux/interrupt.h:336:83: warning: unused parameter a??flagsa?? [-Wunused-parameter]
In file included from include/linux/sched.h:42:0,
                 from include/linux/kernel_stat.h:9,
                 from mm/vmscan.c:17:
include/linux/rtmutex.h: In function a??rt_mutex_debug_check_no_locks_freeda??:
include/linux/rtmutex.h:48:68: warning: unused parameter a??froma?? [-Wunused-parameter]
include/linux/rtmutex.h:49:28: warning: unused parameter a??lena?? [-Wunused-parameter]
In file included from include/linux/sched.h:50:0,
                 from include/linux/kernel_stat.h:9,
                 from mm/vmscan.c:17:
include/linux/latencytop.h: In function a??account_scheduler_latencya??:
include/linux/latencytop.h:43:47: warning: unused parameter a??taska?? [-Wunused-parameter]
include/linux/latencytop.h:43:57: warning: unused parameter a??usecsa?? [-Wunused-parameter]
include/linux/latencytop.h:43:68: warning: unused parameter a??intera?? [-Wunused-parameter]
include/linux/latencytop.h: In function a??clear_all_latency_tracinga??:
include/linux/latencytop.h:47:66: warning: unused parameter a??pa?? [-Wunused-parameter]
In file included from include/linux/sched.h:51:0,
                 from include/linux/kernel_stat.h:9,
                 from mm/vmscan.c:17:
include/linux/cred.h: In function a??validate_credsa??:
include/linux/cred.h:188:54: warning: unused parameter a??creda?? [-Wunused-parameter]
include/linux/cred.h: In function a??validate_creds_for_do_exita??:
include/linux/cred.h:191:67: warning: unused parameter a??tska?? [-Wunused-parameter]
In file included from include/linux/kernel_stat.h:9:0,
                 from mm/vmscan.c:17:
include/linux/sched.h: In function a??prefetch_stacka??:
include/linux/sched.h:910:55: warning: unused parameter a??ta?? [-Wunused-parameter]
include/linux/sched.h: In function a??task_numa_faulta??:
include/linux/sched.h:1423:40: warning: unused parameter a??nodea?? [-Wunused-parameter]
include/linux/sched.h:1423:50: warning: unused parameter a??pagesa?? [-Wunused-parameter]
include/linux/sched.h:1423:62: warning: unused parameter a??migrateda?? [-Wunused-parameter]
include/linux/sched.h: In function a??set_numabalancing_statea??:
include/linux/sched.h:1426:49: warning: unused parameter a??enableda?? [-Wunused-parameter]
include/linux/sched.h: In function a??rcu_copy_processa??:
include/linux/sched.h:1732:57: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/sched.h: In function a??sched_autogroup_create_attacha??:
include/linux/sched.h:1880:70: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/sched.h: In function a??sched_autogroup_detacha??:
include/linux/sched.h:1881:63: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/sched.h: In function a??sched_autogroup_forka??:
include/linux/sched.h:1882:63: warning: unused parameter a??siga?? [-Wunused-parameter]
include/linux/sched.h: In function a??sched_autogroup_exita??:
include/linux/sched.h:1883:63: warning: unused parameter a??siga?? [-Wunused-parameter]
include/linux/sched.h: In function a??spin_needbreaka??:
include/linux/sched.h:2454:46: warning: unused parameter a??locka?? [-Wunused-parameter]
include/linux/sched.h: In function a??mm_update_next_ownera??:
include/linux/sched.h:2616:59: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/sched.h: In function a??mm_init_ownera??:
include/linux/sched.h:2620:52: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/sched.h:2620:76: warning: unused parameter a??pa?? [-Wunused-parameter]
In file included from include/linux/slub_def.h:15:0,
                 from include/linux/slab.h:297,
                 from include/linux/xattr.h:14,
                 from include/linux/cgroup.h:21,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/kmemleak.h: In function a??kmemleak_alloca??:
include/linux/kmemleak.h:64:47: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h:64:59: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemleak.h:64:69: warning: unused parameter a??min_counta?? [-Wunused-parameter]
include/linux/kmemleak.h:65:13: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_alloc_recursivea??:
include/linux/kmemleak.h:68:57: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h:68:69: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemleak.h:69:14: warning: unused parameter a??min_counta?? [-Wunused-parameter]
include/linux/kmemleak.h:69:39: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/kmemleak.h:70:16: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_alloc_percpua??:
include/linux/kmemleak.h:73:63: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h:73:75: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_freea??:
include/linux/kmemleak.h:76:46: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_free_parta??:
include/linux/kmemleak.h:79:51: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h:79:63: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_free_recursivea??:
include/linux/kmemleak.h:82:56: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h:82:75: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_free_percpua??:
include/linux/kmemleak.h:85:62: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_not_leaka??:
include/linux/kmemleak.h:88:50: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_ignorea??:
include/linux/kmemleak.h:91:48: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_scan_areaa??:
include/linux/kmemleak.h:94:51: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h:94:63: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemleak.h:94:75: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_erasea??:
include/linux/kmemleak.h:97:42: warning: unused parameter a??ptra?? [-Wunused-parameter]
include/linux/kmemleak.h: In function a??kmemleak_no_scana??:
include/linux/kmemleak.h:100:49: warning: unused parameter a??ptra?? [-Wunused-parameter]
In file included from include/linux/fs.h:7:0,
                 from include/linux/cgroup.h:22,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/kdev_t.h: In function a??new_valid_deva??:
include/linux/kdev_t.h:38:39: warning: unused parameter a??deva?? [-Wunused-parameter]
include/linux/kdev_t.h: In function a??huge_valid_deva??:
include/linux/kdev_t.h:57:40: warning: unused parameter a??deva?? [-Wunused-parameter]
In file included from include/linux/fs.h:15:0,
                 from include/linux/cgroup.h:22,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/radix-tree.h: In function a??radix_tree_deref_slot_protecteda??:
include/linux/radix-tree.h:166:20: warning: unused parameter a??treelocka?? [-Wunused-parameter]
In file included from include/linux/quota.h:48:0,
                 from include/linux/fs.h:247,
                 from include/linux/cgroup.h:22,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/projid.h: In function a??make_kprojida??:
include/linux/projid.h:79:61: warning: unused parameter a??froma?? [-Wunused-parameter]
include/linux/projid.h: In function a??from_kprojida??:
include/linux/projid.h:84:60: warning: unused parameter a??toa?? [-Wunused-parameter]
include/linux/projid.h: In function a??kprojid_has_mappinga??:
include/linux/projid.h:97:63: warning: unused parameter a??nsa?? [-Wunused-parameter]
include/linux/projid.h:97:77: warning: unused parameter a??projida?? [-Wunused-parameter]
In file included from include/linux/cgroup.h:22:0,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/fs.h: In function a??file_take_writea??:
include/linux/fs.h:863:49: warning: unused parameter a??filpa?? [-Wunused-parameter]
include/linux/fs.h: In function a??file_release_writea??:
include/linux/fs.h:864:52: warning: unused parameter a??filpa?? [-Wunused-parameter]
include/linux/fs.h: In function a??file_reset_writea??:
include/linux/fs.h:865:50: warning: unused parameter a??filpa?? [-Wunused-parameter]
include/linux/fs.h: In function a??file_check_statea??:
include/linux/fs.h:866:50: warning: unused parameter a??filpa?? [-Wunused-parameter]
include/linux/fs.h: In function a??file_check_writeablea??:
include/linux/fs.h:867:53: warning: unused parameter a??filpa?? [-Wunused-parameter]
In file included from include/linux/cgroup.h:22:0,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/fs.h: In function a??i_readcount_deca??:
include/linux/fs.h:2287:50: warning: unused parameter a??inodea?? [-Wunused-parameter]
include/linux/fs.h: In function a??i_readcount_inca??:
include/linux/fs.h:2291:50: warning: unused parameter a??inodea?? [-Wunused-parameter]
In file included from include/linux/cgroup.h:22:0,
                 from include/linux/memcontrol.h:22,
                 from include/linux/swap.h:8,
                 from mm/vmscan.c:18:
include/linux/fs.h: In function a??lockdep_annotate_inode_mutex_keya??:
include/linux/fs.h:2342:67: warning: unused parameter a??inodea?? [-Wunused-parameter]
include/linux/fs.h: In function a??xip_truncate_pagea??:
include/linux/fs.h:2436:59: warning: unused parameter a??mappinga?? [-Wunused-parameter]
include/linux/fs.h:2436:75: warning: unused parameter a??froma?? [-Wunused-parameter]
include/linux/fs.h: In function a??__simple_attr_check_formata??:
include/linux/fs.h:2650:45: warning: unused parameter a??fmta?? [-Wunused-parameter]
In file included from include/linux/swap.h:8:0,
                 from mm/vmscan.c:18:
include/linux/memcontrol.h: In function a??mem_cgroup_newpage_chargea??:
include/linux/memcontrol.h:206:58: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:207:24: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/memcontrol.h:207:34: warning: unused parameter a??gfp_maska?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_cache_chargea??:
include/linux/memcontrol.h:212:56: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:213:24: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/memcontrol.h:213:34: warning: unused parameter a??gfp_maska?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_try_charge_swapina??:
include/linux/memcontrol.h:218:66: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/memcontrol.h:219:16: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:219:28: warning: unused parameter a??gfp_maska?? [-Wunused-parameter]
include/linux/memcontrol.h:219:58: warning: unused parameter a??memcgpa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_commit_charge_swapina??:
include/linux/memcontrol.h:224:65: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:225:27: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_cancel_charge_swapina??:
include/linux/memcontrol.h:229:71: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_uncharge_pagea??:
include/linux/memcontrol.h:241:58: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_uncharge_cache_pagea??:
include/linux/memcontrol.h:245:64: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_zone_lruveca??:
include/linux/memcontrol.h:250:30: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_page_lruveca??:
include/linux/memcontrol.h:255:66: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??try_get_mem_cgroup_from_pagea??:
include/linux/memcontrol.h:261:76: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??try_get_mem_cgroup_from_mma??:
include/linux/memcontrol.h:266:79: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mm_match_cgroupa??:
include/linux/memcontrol.h:271:54: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/memcontrol.h:272:22: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??task_in_mem_cgroupa??:
include/linux/memcontrol.h:277:59: warning: unused parameter a??taska?? [-Wunused-parameter]
include/linux/memcontrol.h:278:36: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_cssa??:
include/linux/memcontrol.h:284:38: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_prepare_migrationa??:
include/linux/memcontrol.h:290:43: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:290:62: warning: unused parameter a??newpagea?? [-Wunused-parameter]
include/linux/memcontrol.h:291:29: warning: unused parameter a??memcgpa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_end_migrationa??:
include/linux/memcontrol.h:295:64: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h:296:16: warning: unused parameter a??oldpagea?? [-Wunused-parameter]
include/linux/memcontrol.h:296:38: warning: unused parameter a??newpagea?? [-Wunused-parameter]
include/linux/memcontrol.h:296:52: warning: unused parameter a??migration_oka?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_itera??:
include/linux/memcontrol.h:301:36: warning: unused parameter a??roota?? [-Wunused-parameter]
include/linux/memcontrol.h:302:22: warning: unused parameter a??preva?? [-Wunused-parameter]
include/linux/memcontrol.h:303:37: warning: unused parameter a??reclaima?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_iter_breaka??:
include/linux/memcontrol.h:308:61: warning: unused parameter a??roota?? [-Wunused-parameter]
include/linux/memcontrol.h:309:26: warning: unused parameter a??preva?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_inactive_anon_is_lowa??:
include/linux/memcontrol.h:319:48: warning: unused parameter a??lruveca?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_get_lru_sizea??:
include/linux/memcontrol.h:325:40: warning: unused parameter a??lruveca?? [-Wunused-parameter]
include/linux/memcontrol.h:325:62: warning: unused parameter a??lrua?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_update_lru_sizea??:
include/linux/memcontrol.h:331:43: warning: unused parameter a??lruveca?? [-Wunused-parameter]
include/linux/memcontrol.h:331:65: warning: unused parameter a??lrua?? [-Wunused-parameter]
include/linux/memcontrol.h:332:14: warning: unused parameter a??incrementa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_print_oom_infoa??:
include/linux/memcontrol.h:337:46: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h:337:73: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_begin_update_page_stata??:
include/linux/memcontrol.h:341:67: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:342:12: warning: unused parameter a??lockeda?? [-Wunused-parameter]
include/linux/memcontrol.h:342:35: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_end_update_page_stata??:
include/linux/memcontrol.h:346:65: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:347:12: warning: unused parameter a??lockeda?? [-Wunused-parameter]
include/linux/memcontrol.h:347:35: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_inc_page_stata??:
include/linux/memcontrol.h:351:58: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:352:41: warning: unused parameter a??idxa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_dec_page_stata??:
include/linux/memcontrol.h:356:58: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:357:41: warning: unused parameter a??idxa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_soft_limit_reclaima??:
include/linux/memcontrol.h:362:58: warning: unused parameter a??zonea?? [-Wunused-parameter]
include/linux/memcontrol.h:362:68: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/memcontrol.h:363:16: warning: unused parameter a??gfp_maska?? [-Wunused-parameter]
include/linux/memcontrol.h:364:25: warning: unused parameter a??total_scanneda?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_split_huge_fixupa??:
include/linux/memcontrol.h:369:61: warning: unused parameter a??heada?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_count_vm_eventa??:
include/linux/memcontrol.h:374:50: warning: unused parameter a??mma?? [-Wunused-parameter]
include/linux/memcontrol.h:374:73: warning: unused parameter a??idxa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_replace_page_cachea??:
include/linux/memcontrol.h:377:63: warning: unused parameter a??oldpagea?? [-Wunused-parameter]
include/linux/memcontrol.h:378:18: warning: unused parameter a??newpagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_bad_page_checka??:
include/linux/memcontrol.h:385:40: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??mem_cgroup_print_bad_pagea??:
include/linux/memcontrol.h:391:40: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??sock_update_memcga??:
include/linux/memcontrol.h:407:51: warning: unused parameter a??ska?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??sock_release_memcga??:
include/linux/memcontrol.h:410:52: warning: unused parameter a??ska?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_kmem_newpage_chargea??:
include/linux/memcontrol.h:575:33: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/memcontrol.h:575:58: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h:575:69: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_kmem_uncharge_pagesa??:
include/linux/memcontrol.h:580:59: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:580:69: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_kmem_commit_chargea??:
include/linux/memcontrol.h:585:39: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/memcontrol.h:585:64: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h:585:75: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_cache_ida??:
include/linux/memcontrol.h:589:53: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_register_cachea??:
include/linux/memcontrol.h:595:41: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h:595:67: warning: unused parameter a??sa?? [-Wunused-parameter]
include/linux/memcontrol.h:596:27: warning: unused parameter a??root_cachea?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_release_cachea??:
include/linux/memcontrol.h:601:59: warning: unused parameter a??cachepa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_cache_list_adda??:
include/linux/memcontrol.h:605:60: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/memcontrol.h:606:25: warning: unused parameter a??sa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??memcg_kmem_get_cachea??:
include/linux/memcontrol.h:611:55: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/memcontrol.h: In function a??kmem_cache_destroy_memcg_childrena??:
include/linux/memcontrol.h:616:73: warning: unused parameter a??sa?? [-Wunused-parameter]
In file included from include/linux/device.h:24:0,
                 from include/linux/node.h:17,
                 from include/linux/swap.h:10,
                 from mm/vmscan.c:18:
include/linux/pinctrl/devinfo.h: In function a??pinctrl_bind_pinsa??:
include/linux/pinctrl/devinfo.h:43:52: warning: unused parameter a??deva?? [-Wunused-parameter]
In file included from mm/vmscan.c:18:0:
include/linux/swap.h: In function a??mem_cgroup_swappinessa??:
include/linux/swap.h:325:60: warning: unused parameter a??mema?? [-Wunused-parameter]
include/linux/swap.h: In function a??mem_cgroup_uncharge_swapa??:
include/linux/swap.h:333:57: warning: unused parameter a??enta?? [-Wunused-parameter]
include/linux/swap.h: In function a??mem_cgroup_uncharge_swapcachea??:
include/linux/swap.h:410:44: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/swap.h:410:62: warning: unused parameter a??enta?? [-Wunused-parameter]
include/linux/swap.h:410:72: warning: unused parameter a??swapouta?? [-Wunused-parameter]
In file included from include/linux/pagemap.h:10:0,
                 from mm/vmscan.c:19:
include/linux/highmem.h: In function a??flush_anon_pagea??:
include/linux/highmem.h:14:59: warning: unused parameter a??vmaa?? [-Wunused-parameter]
include/linux/highmem.h:14:77: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/highmem.h:14:97: warning: unused parameter a??vmaddra?? [-Wunused-parameter]
include/linux/highmem.h: In function a??flush_kernel_dcache_pagea??:
include/linux/highmem.h:20:58: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/highmem.h: In function a??flush_kernel_vmap_rangea??:
include/linux/highmem.h:23:50: warning: unused parameter a??vaddra?? [-Wunused-parameter]
include/linux/highmem.h:23:61: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/highmem.h: In function a??invalidate_kernel_vmap_rangea??:
include/linux/highmem.h:26:55: warning: unused parameter a??vaddra?? [-Wunused-parameter]
include/linux/highmem.h:26:66: warning: unused parameter a??sizea?? [-Wunused-parameter]
In file included from include/linux/pagemap.h:10:0,
                 from mm/vmscan.c:19:
include/linux/highmem.h: In function a??kunmapa??:
include/linux/highmem.h:62:40: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/highmem.h: In function a??__kunmap_atomica??:
include/linux/highmem.h:73:42: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/highmem.h: In function a??copy_user_highpagea??:
include/linux/highmem.h:225:46: warning: unused parameter a??vmaa?? [-Wunused-parameter]
In file included from mm/vmscan.c:22:0:
include/linux/vmpressure.h: In function a??vmpressurea??:
include/linux/vmpressure.h:42:37: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/vmpressure.h:42:61: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/vmpressure.h:43:24: warning: unused parameter a??scanneda?? [-Wunused-parameter]
include/linux/vmpressure.h:43:47: warning: unused parameter a??reclaimeda?? [-Wunused-parameter]
include/linux/vmpressure.h: In function a??vmpressure_prioa??:
include/linux/vmpressure.h:44:42: warning: unused parameter a??gfpa?? [-Wunused-parameter]
include/linux/vmpressure.h:44:66: warning: unused parameter a??memcga?? [-Wunused-parameter]
include/linux/vmpressure.h:45:12: warning: unused parameter a??prioa?? [-Wunused-parameter]
In file included from include/linux/blkdev.h:14:0,
                 from mm/vmscan.c:26:
include/linux/backing-dev.h: In function a??bdi_stat_errora??:
include/linux/backing-dev.h:209:69: warning: unused parameter a??bdia?? [-Wunused-parameter]
include/linux/backing-dev.h: In function a??bdi_sched_waita??:
include/linux/backing-dev.h:353:40: warning: unused parameter a??worda?? [-Wunused-parameter]
In file included from include/linux/blkdev.h:17:0,
                 from mm/vmscan.c:26:
include/linux/bio.h: In function a??bio_flush_dcache_pagesa??:
include/linux/bio.h:291:55: warning: unused parameter a??bia?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_associate_currenta??:
include/linux/bio.h:314:53: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_disassociate_taska??:
include/linux/bio.h:315:54: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bvec_kmap_irqa??:
include/linux/bio.h:348:72: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bvec_kunmap_irqa??:
include/linux/bio.h:353:42: warning: unused parameter a??buffera?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integritya??:
include/linux/bio.h:594:45: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_enableda??:
include/linux/bio.h:599:53: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bioset_integrity_createa??:
include/linux/bio.h:604:59: warning: unused parameter a??bsa?? [-Wunused-parameter]
include/linux/bio.h:604:67: warning: unused parameter a??pool_sizea?? [-Wunused-parameter]
include/linux/bio.h: In function a??bioset_integrity_freea??:
include/linux/bio.h:609:59: warning: unused parameter a??bsa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_prepa??:
include/linux/bio.h:614:50: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_freea??:
include/linux/bio.h:619:51: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_clonea??:
include/linux/bio.h:624:51: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h:624:68: warning: unused parameter a??bio_srca?? [-Wunused-parameter]
include/linux/bio.h:625:17: warning: unused parameter a??gfp_maska?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_splita??:
include/linux/bio.h:630:52: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h:630:74: warning: unused parameter a??bpa?? [-Wunused-parameter]
include/linux/bio.h:631:16: warning: unused parameter a??sectorsa?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_advancea??:
include/linux/bio.h:636:54: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h:637:20: warning: unused parameter a??bytes_donea?? [-Wunused-parameter]
include/linux/bio.h: In function a??bio_integrity_trima??:
include/linux/bio.h:642:51: warning: unused parameter a??bioa?? [-Wunused-parameter]
include/linux/bio.h:642:69: warning: unused parameter a??offseta?? [-Wunused-parameter]
include/linux/bio.h:643:24: warning: unused parameter a??sectorsa?? [-Wunused-parameter]
In file included from mm/vmscan.c:26:0:
include/linux/blkdev.h: In function a??rq_flush_dcache_pagesa??:
include/linux/blkdev.h:726:58: warning: unused parameter a??rqa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_pm_runtime_inita??:
include/linux/blkdev.h:979:62: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h:980:17: warning: unused parameter a??deva?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_pre_runtime_suspenda??:
include/linux/blkdev.h:981:65: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_post_runtime_suspenda??:
include/linux/blkdev.h:985:67: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h:985:74: warning: unused parameter a??erra?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_pre_runtime_resumea??:
include/linux/blkdev.h:986:65: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_post_runtime_resumea??:
include/linux/blkdev.h:987:66: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h:987:73: warning: unused parameter a??erra?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??set_start_time_nsa??:
include/linux/blkdev.h:1348:54: warning: unused parameter a??reqa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??set_io_start_time_nsa??:
include/linux/blkdev.h:1349:57: warning: unused parameter a??reqa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??rq_start_time_nsa??:
include/linux/blkdev.h:1350:57: warning: unused parameter a??reqa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??rq_io_start_time_nsa??:
include/linux/blkdev.h:1354:60: warning: unused parameter a??reqa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_rqa??:
include/linux/blkdev.h:1450:52: warning: unused parameter a??rqa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_rq_count_integrity_sga??:
include/linux/blkdev.h:1454:67: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h:1455:22: warning: unused parameter a??ba?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_rq_map_integrity_sga??:
include/linux/blkdev.h:1459:65: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h:1460:20: warning: unused parameter a??ba?? [-Wunused-parameter]
include/linux/blkdev.h:1461:28: warning: unused parameter a??sa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??bdev_get_integritya??:
include/linux/blkdev.h:1465:77: warning: unused parameter a??ba?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_get_integritya??:
include/linux/blkdev.h:1469:71: warning: unused parameter a??diska?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_comparea??:
include/linux/blkdev.h:1473:57: warning: unused parameter a??aa?? [-Wunused-parameter]
include/linux/blkdev.h:1473:76: warning: unused parameter a??ba?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_registera??:
include/linux/blkdev.h:1477:58: warning: unused parameter a??da?? [-Wunused-parameter]
include/linux/blkdev.h:1478:29: warning: unused parameter a??ba?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_unregistera??:
include/linux/blkdev.h:1482:61: warning: unused parameter a??da?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_queue_max_integrity_segmentsa??:
include/linux/blkdev.h:1485:75: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h:1486:24: warning: unused parameter a??segsa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??queue_max_integrity_segmentsa??:
include/linux/blkdev.h:1489:81: warning: unused parameter a??qa?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_merge_rqa??:
include/linux/blkdev.h:1493:64: warning: unused parameter a??rqa?? [-Wunused-parameter]
include/linux/blkdev.h:1494:23: warning: unused parameter a??r1a?? [-Wunused-parameter]
include/linux/blkdev.h:1495:23: warning: unused parameter a??r2a?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_merge_bioa??:
include/linux/blkdev.h:1499:65: warning: unused parameter a??rqa?? [-Wunused-parameter]
include/linux/blkdev.h:1500:24: warning: unused parameter a??ra?? [-Wunused-parameter]
include/linux/blkdev.h:1501:20: warning: unused parameter a??ba?? [-Wunused-parameter]
include/linux/blkdev.h: In function a??blk_integrity_is_initializeda??:
include/linux/blkdev.h:1505:65: warning: unused parameter a??ga?? [-Wunused-parameter]
In file included from mm/vmscan.c:45:0:
include/linux/prefetch.h: In function a??prefetch_rangea??:
include/linux/prefetch.h:53:41: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/prefetch.h:53:54: warning: unused parameter a??lena?? [-Wunused-parameter]
In file included from mm/vmscan.c:50:0:
include/linux/swapops.h: In function a??make_hwpoison_entrya??:
include/linux/swapops.h:177:60: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/swapops.h: In function a??is_hwpoison_entrya??:
include/linux/swapops.h:182:49: warning: unused parameter a??swpa?? [-Wunused-parameter]
In file included from mm/vmscan.c:55:0:
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_kswapd_sleepa??:
include/trace/events/vmscan.h:39:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_kswapd_wakea??:
include/trace/events/vmscan.h:56:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_wakeup_kswapda??:
include/trace/events/vmscan.h:75:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_direct_reclaim_begina??:
include/trace/events/vmscan.h:123:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_memcg_reclaim_begina??:
include/trace/events/vmscan.h:130:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_memcg_softlimit_reclaim_begina??:
include/trace/events/vmscan.h:137:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_direct_reclaim_enda??:
include/trace/events/vmscan.h:161:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_memcg_reclaim_enda??:
include/trace/events/vmscan.h:168:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_memcg_softlimit_reclaim_enda??:
include/trace/events/vmscan.h:175:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_shrink_slab_starta??:
include/trace/events/vmscan.h:182:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_shrink_slab_enda??:
include/trace/events/vmscan.h:227:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_lru_isolatea??:
include/trace/events/vmscan.h:298:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_memcg_isolatea??:
include/trace/events/vmscan.h:311:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_writepagea??:
include/trace/events/vmscan.h:324:1: warning: unused parameter a??cba?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??check_trace_callback_type_mm_vmscan_lru_shrink_inactivea??:
include/trace/events/vmscan.h:347:1: warning: unused parameter a??cba?? [-Wunused-parameter]
In file included from include/linux/ring_buffer.h:4:0,
                 from include/linux/ftrace_event.h:4,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/linux/kmemcheck.h: In function a??kmemcheck_alloc_shadowa??:
include/linux/kmemcheck.h:93:37: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/kmemcheck.h:93:47: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/kmemcheck.h:93:60: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/linux/kmemcheck.h:93:71: warning: unused parameter a??nodea?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_free_shadowa??:
include/linux/kmemcheck.h:98:36: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/linux/kmemcheck.h:98:46: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_slab_alloca??:
include/linux/kmemcheck.h:103:41: warning: unused parameter a??sa?? [-Wunused-parameter]
include/linux/kmemcheck.h:103:50: warning: unused parameter a??gfpflagsa?? [-Wunused-parameter]
include/linux/kmemcheck.h:103:66: warning: unused parameter a??objecta?? [-Wunused-parameter]
include/linux/kmemcheck.h:104:15: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_slab_freea??:
include/linux/kmemcheck.h:108:59: warning: unused parameter a??sa?? [-Wunused-parameter]
include/linux/kmemcheck.h:108:68: warning: unused parameter a??objecta?? [-Wunused-parameter]
include/linux/kmemcheck.h:109:19: warning: unused parameter a??sizea?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_pagealloc_alloca??:
include/linux/kmemcheck.h:113:59: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/kmemcheck.h:114:15: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/linux/kmemcheck.h:114:28: warning: unused parameter a??gfpflagsa?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_page_is_trackeda??:
include/linux/kmemcheck.h:118:59: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_unallocateda??:
include/linux/kmemcheck.h:123:53: warning: unused parameter a??addressa?? [-Wunused-parameter]
include/linux/kmemcheck.h:123:75: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_uninitializeda??:
include/linux/kmemcheck.h:127:55: warning: unused parameter a??addressa?? [-Wunused-parameter]
include/linux/kmemcheck.h:127:77: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_initializeda??:
include/linux/kmemcheck.h:131:53: warning: unused parameter a??addressa?? [-Wunused-parameter]
include/linux/kmemcheck.h:131:75: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_freeda??:
include/linux/kmemcheck.h:135:47: warning: unused parameter a??addressa?? [-Wunused-parameter]
include/linux/kmemcheck.h:135:69: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_unallocated_pagesa??:
include/linux/kmemcheck.h:139:66: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/kmemcheck.h:140:24: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_uninitialized_pagesa??:
include/linux/kmemcheck.h:144:68: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/kmemcheck.h:145:26: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_mark_initialized_pagesa??:
include/linux/kmemcheck.h:149:66: warning: unused parameter a??pa?? [-Wunused-parameter]
include/linux/kmemcheck.h:150:24: warning: unused parameter a??na?? [-Wunused-parameter]
include/linux/kmemcheck.h: In function a??kmemcheck_is_obj_initializeda??:
include/linux/kmemcheck.h:154:63: warning: unused parameter a??addra?? [-Wunused-parameter]
include/linux/kmemcheck.h:154:76: warning: unused parameter a??sizea?? [-Wunused-parameter]
In file included from include/linux/ring_buffer.h:6:0,
                 from include/linux/ftrace_event.h:4,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/linux/seq_file.h: In function a??seq_user_nsa??:
include/linux/seq_file.h:136:67: warning: unused parameter a??seqa?? [-Wunused-parameter]
In file included from include/linux/ftrace_event.h:4:0,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/linux/ring_buffer.h: In function a??ring_buffer_swap_cpua??:
include/linux/ring_buffer.h:150:42: warning: unused parameter a??buffer_aa?? [-Wunused-parameter]
include/linux/ring_buffer.h:151:28: warning: unused parameter a??buffer_ba?? [-Wunused-parameter]
include/linux/ring_buffer.h:151:42: warning: unused parameter a??cpua?? [-Wunused-parameter]
In file included from include/linux/perf_event.h:35:0,
                 from include/linux/ftrace_event.h:8,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
/root/linux-next/arch/x86/include/asm/hw_breakpoint.h: In function a??hw_breakpoint_slotsa??:
/root/linux-next/arch/x86/include/asm/hw_breakpoint.h:45:43: warning: unused parameter a??typea?? [-Wunused-parameter]
In file included from include/linux/ftrace.h:10:0,
                 from include/linux/perf_event.h:47,
                 from include/linux/ftrace_event.h:8,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/linux/kallsyms.h: In function a??__check_printsym_formata??:
include/linux/kallsyms.h:112:42: warning: unused parameter a??fmta?? [-Wunused-parameter]
In file included from include/linux/perf_event.h:47:0,
                 from include/linux/ftrace_event.h:8,
                 from include/trace/ftrace.h:19,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/linux/ftrace.h: In function a??skip_tracea??:
include/linux/ftrace.h:531:44: warning: unused parameter a??ipa?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_release_moda??:
include/linux/ftrace.h:535:54: warning: unused parameter a??moda?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??register_ftrace_commanda??:
include/linux/ftrace.h:536:71: warning: unused parameter a??cmda?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??unregister_ftrace_commanda??:
include/linux/ftrace.h:540:51: warning: unused parameter a??cmd_namea?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_text_reserveda??:
include/linux/ftrace.h:544:46: warning: unused parameter a??starta?? [-Wunused-parameter]
include/linux/ftrace.h:544:59: warning: unused parameter a??enda?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_locationa??:
include/linux/ftrace.h:548:59: warning: unused parameter a??ipa?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_filter_writea??:
include/linux/ftrace.h:565:56: warning: unused parameter a??filea?? [-Wunused-parameter]
include/linux/ftrace.h:565:81: warning: unused parameter a??ubufa?? [-Wunused-parameter]
include/linux/ftrace.h:566:15: warning: unused parameter a??cnta?? [-Wunused-parameter]
include/linux/ftrace.h:566:28: warning: unused parameter a??pposa?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_notrace_writea??:
include/linux/ftrace.h:567:57: warning: unused parameter a??filea?? [-Wunused-parameter]
include/linux/ftrace.h:567:82: warning: unused parameter a??ubufa?? [-Wunused-parameter]
include/linux/ftrace.h:568:16: warning: unused parameter a??cnta?? [-Wunused-parameter]
include/linux/ftrace.h:568:29: warning: unused parameter a??pposa?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_regex_releasea??:
include/linux/ftrace.h:570:36: warning: unused parameter a??inodea?? [-Wunused-parameter]
include/linux/ftrace.h:570:56: warning: unused parameter a??filea?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??__ftrace_enabled_restorea??:
include/linux/ftrace.h:601:49: warning: unused parameter a??enableda?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??time_hardirqs_ona??:
include/linux/ftrace.h:632:53: warning: unused parameter a??a0a?? [-Wunused-parameter]
include/linux/ftrace.h:632:71: warning: unused parameter a??a1a?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??time_hardirqs_offa??:
include/linux/ftrace.h:633:54: warning: unused parameter a??a0a?? [-Wunused-parameter]
include/linux/ftrace.h:633:72: warning: unused parameter a??a1a?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_graph_init_taska??:
include/linux/ftrace.h:761:63: warning: unused parameter a??ta?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_graph_exit_taska??:
include/linux/ftrace.h:762:63: warning: unused parameter a??ta?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??ftrace_graph_init_idle_taska??:
include/linux/ftrace.h:763:68: warning: unused parameter a??ta?? [-Wunused-parameter]
include/linux/ftrace.h:763:75: warning: unused parameter a??cpua?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??register_ftrace_grapha??:
include/linux/ftrace.h:765:64: warning: unused parameter a??retfunca?? [-Wunused-parameter]
include/linux/ftrace.h:766:29: warning: unused parameter a??entryfunca?? [-Wunused-parameter]
include/linux/ftrace.h: In function a??task_curr_ret_stacka??:
include/linux/ftrace.h:772:59: warning: unused parameter a??tska?? [-Wunused-parameter]
In file included from include/trace/ftrace.h:285:0,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_kswapd_sleepa??:
include/trace/events/vmscan.h:39:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_kswapd_wakea??:
include/trace/events/vmscan.h:56:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_wakeup_kswapda??:
include/trace/events/vmscan.h:75:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_direct_reclaim_begin_templatea??:
include/trace/events/vmscan.h:99:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_direct_reclaim_end_templatea??:
include/trace/events/vmscan.h:144:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_shrink_slab_starta??:
include/trace/events/vmscan.h:182:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_shrink_slab_enda??:
include/trace/events/vmscan.h:227:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_lru_isolate_templatea??:
include/trace/events/vmscan.h:260:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_writepagea??:
include/trace/events/vmscan.h:324:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_raw_output_mm_vmscan_lru_shrink_inactivea??:
include/trace/events/vmscan.h:347:1: warning: unused parameter a??flagsa?? [-Wunused-parameter]
In file included from include/trace/ftrace.h:393:0,
                 from include/trace/define_trace.h:86,
                 from include/trace/events/vmscan.h:383,
                 from mm/vmscan.c:55:
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_kswapd_sleepa??:
include/trace/events/vmscan.h:39:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:39:1: warning: unused parameter a??nida?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_kswapd_wakea??:
include/trace/events/vmscan.h:56:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:56:1: warning: unused parameter a??nida?? [-Wunused-parameter]
include/trace/events/vmscan.h:56:1: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_wakeup_kswapda??:
include/trace/events/vmscan.h:75:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:75:1: warning: unused parameter a??nida?? [-Wunused-parameter]
include/trace/events/vmscan.h:75:1: warning: unused parameter a??zida?? [-Wunused-parameter]
include/trace/events/vmscan.h:75:1: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_direct_reclaim_begin_templatea??:
include/trace/events/vmscan.h:99:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:99:1: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/trace/events/vmscan.h:99:1: warning: unused parameter a??may_writepagea?? [-Wunused-parameter]
include/trace/events/vmscan.h:99:1: warning: unused parameter a??gfp_flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_direct_reclaim_end_templatea??:
include/trace/events/vmscan.h:144:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:144:1: warning: unused parameter a??nr_reclaimeda?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_shrink_slab_starta??:
include/trace/events/vmscan.h:182:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??shra?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??sca?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??nr_objects_to_shrinka?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??pgs_scanneda?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??lru_pgsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??cache_itemsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??deltaa?? [-Wunused-parameter]
include/trace/events/vmscan.h:182:1: warning: unused parameter a??total_scana?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_shrink_slab_enda??:
include/trace/events/vmscan.h:227:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:227:1: warning: unused parameter a??shra?? [-Wunused-parameter]
include/trace/events/vmscan.h:227:1: warning: unused parameter a??shrinker_retvala?? [-Wunused-parameter]
include/trace/events/vmscan.h:227:1: warning: unused parameter a??unused_scan_cnta?? [-Wunused-parameter]
include/trace/events/vmscan.h:227:1: warning: unused parameter a??new_scan_cnta?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_lru_isolate_templatea??:
include/trace/events/vmscan.h:260:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:260:1: warning: unused parameter a??ordera?? [-Wunused-parameter]
include/trace/events/vmscan.h:260:1: warning: unused parameter a??nr_requesteda?? [-Wunused-parameter]
include/trace/events/vmscan.h:260:1: warning: unused parameter a??nr_scanneda?? [-Wunused-parameter]
include/trace/events/vmscan.h:260:1: warning: unused parameter a??nr_takena?? [-Wunused-parameter]
include/trace/events/vmscan.h:260:1: warning: unused parameter a??isolate_modea?? [-Wunused-parameter]
include/trace/events/vmscan.h:260:1: warning: unused parameter a??filea?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_writepagea??:
include/trace/events/vmscan.h:324:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:324:1: warning: unused parameter a??pagea?? [-Wunused-parameter]
include/trace/events/vmscan.h:324:1: warning: unused parameter a??reclaim_flagsa?? [-Wunused-parameter]
include/trace/events/vmscan.h: In function a??ftrace_get_offsets_mm_vmscan_lru_shrink_inactivea??:
include/trace/events/vmscan.h:347:1: warning: unused parameter a??__data_offsetsa?? [-Wunused-parameter]
include/trace/events/vmscan.h:347:1: warning: unused parameter a??nida?? [-Wunused-parameter]
include/trace/events/vmscan.h:347:1: warning: unused parameter a??zida?? [-Wunused-parameter]
include/trace/events/vmscan.h:347:1: warning: unused parameter a??nr_scanneda?? [-Wunused-parameter]
include/trace/events/vmscan.h:347:1: warning: unused parameter a??nr_reclaimeda?? [-Wunused-parameter]
include/trace/events/vmscan.h:347:1: warning: unused parameter a??prioritya?? [-Wunused-parameter]
include/trace/events/vmscan.h:347:1: warning: unused parameter a??reclaim_flagsa?? [-Wunused-parameter]
mm/vmscan.c: In function a??global_reclaima??:
mm/vmscan.c:143:49: warning: unused parameter a??sca?? [-Wunused-parameter]
mm/vmscan.c: In function a??may_write_to_queuea??:
mm/vmscan.c:364:31: warning: unused parameter a??sca?? [-Wunused-parameter]
mm/vmscan.c: In function a??throttle_direct_reclaima??:
mm/vmscan.c:2507:18: warning: unused parameter a??nodemaska?? [-Wunused-parameter]
mm/vmscan.c: In function a??cpu_callbacka??:
mm/vmscan.c:3381:48: warning: unused parameter a??nfba?? [-Wunused-parameter]
mm/vmscan.c:3382:10: warning: unused parameter a??hcpua?? [-Wunused-parameter]
mm/vmscan.c: In function a??read_scan_unevictable_nodea??:
mm/vmscan.c:3763:58: warning: unused parameter a??deva?? [-Wunused-parameter]
mm/vmscan.c:3764:33: warning: unused parameter a??attra?? [-Wunused-parameter]
mm/vmscan.c: In function a??write_scan_unevictable_nodea??:
mm/vmscan.c:3771:59: warning: unused parameter a??deva?? [-Wunused-parameter]
mm/vmscan.c:3772:34: warning: unused parameter a??attra?? [-Wunused-parameter]
mm/vmscan.c:3773:18: warning: unused parameter a??bufa?? [-Wunused-parameter]
mm/vmscan.c:3773:30: warning: unused parameter a??counta?? [-Wunused-parameter]

In file included from /root/linux-next/arch/x86/include/asm/bitops.h:16:0,
                 from include/linux/bitops.h:22,
                 from include/linux/kernel.h:10,
                 from include/asm-generic/bug.h:13,
                 from /root/linux-next/arch/x86/include/asm/bug.h:38,
                 from include/linux/bug.h:4,
                 from include/linux/thread_info.h:11,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/wait.h:7,
                 from include/linux/fs.h:6,
                 from mm/shmem.c:24:

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-07-05  4:06     ` Chen Gang
@ 2013-07-08  6:43       ` Chen Gang
  2013-07-09  2:16         ` Chen Gang
  0 siblings, 1 reply; 9+ messages in thread
From: Chen Gang @ 2013-07-08  6:43 UTC (permalink / raw)
  To: Andrew Morton; +Cc: Mel Gorman, hannes, riel, mhocko, linux-mm, linux-kernel

On 07/05/2013 12:06 PM, Chen Gang wrote:
> On 06/19/2013 03:19 PM, Chen Gang wrote:
>> On 06/19/2013 03:10 PM, Andrew Morton wrote:
>>> On Wed, 19 Jun 2013 14:55:13 +0800 Chen Gang <gang.chen@asianux.com> wrote:
>>>
>>>>>
>>>>> 'lru' may be used without initialized, so need regressing part of the
>>>>> related patch.
>>>>>
>>>>> The related patch:
>>>>>   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
>>>>>
>>>>> ...
>>>>>
>>>>> --- a/mm/vmscan.c
>>>>> +++ b/mm/vmscan.c
>>>>> @@ -595,6 +595,7 @@ redo:
>>>>>  		 * unevictable page on [in]active list.
>>>>>  		 * We know how to handle that.
>>>>>  		 */
>>>>> +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>>>>>  		lru_cache_add(page);
>>>>>  	} else {
>>>>>  		/*
>>> That looks right.  Why the heck didn't gcc-4.4.4 (at least) warn about it?
>>>
>>
>> Sorry I don't know either, I find it by reading code, this time.
>>
>> It is really necessary to continue analyzing why. In 2nd half of 2013, I
>> have planned to make some patches outside kernel but related with kernel
>> (e.g. LTP, gcc patches).
>>
>> This kind of issue is a good chance for me to start in 2nd half of 2013
>> (start from next month).
>>
>> So if no others reply for it, I will start analyzing it in the next
>> month, and plan to finish within a month (before 2013-07-31).
>>
>>
>> Welcome additional suggestions or completions.
>>
>> Thanks.
>>

Under the gcc which from the source code in svn. it still has this
issue. I should communicate with gcc mailing list (or their bugzilla)
for it.

I got gcc source code from svn, "configure && make && make install".

[root@gchenlinux linux-next]# which gcc
/usr/local/bin/gcc
[root@gchenlinux linux-next]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ./configure
Thread model: posix
gcc version 4.9.0 20130704 (experimental) (GCC) 


I think, this thread is the end under kernel mailing list. ;-)

Thanks.

> 
> Under gcc 4.7.2 20120921 (Red Hat 4.7.2-2) also cause this issue.
> 
> The root cause is:
> 
>   for putback_lur_page() in mm/vmscan.c for next-20130621 tree.
>   the compiler assumes "lru == LRU_UNEVICTABLE" instead of report warnings (uninitializing lru)
> 
> The details are below, and the related info and warn are in
> attachments, please check, thanks.
> 
> Next, I will compile gcc compiler with the gcc latest code, if also has
> this issue, I should communicate with gcc mailing list for it.
> 
> Thanks.
> 
> ------------------------------analyzing begin---------------------------------
> 
> /* source code in mm/vmscan.c for next-20130621 */
> 
>  580 void putback_lru_page(struct page *page)
>  581 {
>  582         int lru;
>  583         int was_unevictable = PageUnevictable(page);
>  584 
>  585         VM_BUG_ON(PageLRU(page));
>  586 
>  587 redo:
>  588         ClearPageUnevictable(page);
>  589 
>  590         if (page_evictable(page)) {
>  591                 /*
>  592                  * For evictable pages, we can use the cache.
>  593                  * In event of a race, worst case is we end up with an
>  594                  * unevictable page on [in]active list.
>  595                  * We know how to handle that.
>  596                  */
>  597                 lru_cache_add(page);
>  598         } else {
>  599                 /*
>  600                  * Put unevictable pages directly on zone's unevictable
>  601                  * list.
>  602                  */
>  603                 lru = LRU_UNEVICTABLE;
>  604                 add_page_to_unevictable_list(page);
>  605                 /*
>  606                  * When racing with an mlock or AS_UNEVICTABLE clearing
>  607                  * (page is unlocked) make sure that if the other thread
>  608                  * does not observe our setting of PG_lru and fails
>  609                  * isolation/check_move_unevictable_pages,
>  610                  * we see PG_mlocked/AS_UNEVICTABLE cleared below and move
>  611                  * the page back to the evictable list.
>  612                  *
>  613                  * The other side is TestClearPageMlocked() or shmem_lock().
>  614                  */
>  615                 smp_mb();
>  616         }
>  617 
>  618         /*
>  619          * page's status can change while we move it among lru. If an evictable
>  620          * page is on unevictable list, it never be freed. To avoid that,
>  621          * check after we added it to the list, again.
>  622          */
>  623         if (lru == LRU_UNEVICTABLE && page_evictable(page)) {
>  624                 if (!isolate_lru_page(page)) {
>  625                         put_page(page);
>  626                         goto redo;
>  627                 }
>  628                 /* This means someone else dropped this page from LRU
>  629                  * So, it will be freed or putback to LRU again. There is
>  630                  * nothing to do here.
>  631                  */
>  632         }
>  633 
>  634         if (was_unevictable && lru != LRU_UNEVICTABLE)
>  635                 count_vm_event(UNEVICTABLE_PGRESCUED);
>  636         else if (!was_unevictable && lru == LRU_UNEVICTABLE)
>  637                 count_vm_event(UNEVICTABLE_PGCULLED);
>  638 
>  639         put_page(page);         /* drop ref from isolate */
>  640 }
> 
> 
> /*
>  * Related disassemble code:
>  *   make defconfig under x86_64 PC.
>  *   make menuconfig (choose "Automount devtmpfs at /dev..." and KGDB)
>  *   make V=1 EXTRA_CFLAGS=-W (not find related warnings, ref warn.log in attachment)
>  *   objdump -d vmlinux > vmlinux.S
>  *   vi vmlinux.S
>  *
>  * The issue is: compiler assumes "lru == LRU_UNEVICTABLE" instead of report warnings (uninitializing lru)
>  */
> 
> ffffffff810ffda0 <putback_lru_page>:
> ffffffff810ffda0:	55                   	push   %rbp
> ffffffff810ffda1:	48 89 e5             	mov    %rsp,%rbp
> ffffffff810ffda4:	41 55                	push   %r13
> ffffffff810ffda6:	41 54                	push   %r12
> ffffffff810ffda8:	4c 8d 67 02          	lea    0x2(%rdi),%r12		; %r12 for ClearPageUnevictable(page);
> ffffffff810ffdac:	53                   	push   %rbx
> ffffffff810ffdad:	48 89 fb             	mov    %rdi,%rbx		; %rbx = page
> ffffffff810ffdb0:	48 83 ec 08          	sub    $0x8,%rsp		; for lru, was_unevictable, but not used.
> 
> ffffffff810ffdb4:	4c 8b 2f             	mov    (%rdi),%r13		; %r13 = "was_unevictable = PageUnevictable(page);"
> ffffffff810ffdb7:	49 c1 ed 14          	shr    $0x14,%r13
> ffffffff810ffdbb:	41 83e5 01          	and    $0x1,%r13d
> ffffffff810ffdbf:	90                   	nop
> 
> /* redo */
> ffffffff810ffdc0:	f0 41 80 24 24 ef    	lock andb $0xef,(%r12)		; ClearPageUnevictable(page);
> 
> /* if (page_evictable(page)) { */
> ffffffff810ffdc6:	48 89 df             	mov    %rbx,%rdi
> ffffffff810ffdc9:	e8 92 ff ff ff       	callq  ffffffff810ffd60 <page_evictable>
> ffffffff810ffdce:	85 c0                	test   %eax,%eax
> ffffffff810ffdd0:	48 89 df             	mov    %rbx,%rdi
> ffffffff810ffdd3:	74 0b                	je     ffffffff810ffde0 <putback_lru_page+0x40>
> 
> ffffffff810ffdd5:	e8 96 c5 ff ff       	callq  ffffffff810fc370 <lru_cache_add>
> ffffffff810ffdda:	eb 0c                	jmp    ffffffff810ffde8 <putback_lru_page+0x48>
> ffffffff810ffddc:	0f 1f 40 00          	nopl   0x0(%rax)
> 
> /* } else { */
> 						; assume lru == LRU_UNEVICTABLE
> ffffffff810ffde0:	e8 ab c5 ff ff       	callq  ffffffff810fc390 <add_page_to_unevictable_list>
> ffffffff810ffde5:	0f ae f0             	mfence 
> 
> /* } */
> 
> /* if (lru == LRU_UNEVICTABLE && page_evictable(page)) { */
> ffffffff810ffde8:	48 89 df             	mov    %rbx,%rdi
> ffffffff810ffdeb:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
> ffffffff810ffdf0:	e8 6b ff ff ff       	callq  ffffffff810ffd60 <page_evictable>
> ffffffff810ffdf5:	85 c0                	test   %eax,%eax
> ffffffff810ffdf7:	74 1f                	je     ffffffff810ffe18 <putback_lru_page+0x78>  ; assume lru == LRU_UNEVICTABLE
> 
> ffffffff810ffdf9:	48 89 df             	mov    %rbx,%rdi
> ffffffff810ffdfc:	e8 0f fb ff ff       	callq  ffffffff810ff910 <isolate_lru_page>
> ffffffff810ffe01:	85 c0                	test   %eax,%eax
> ffffffff810ffe03:	75 13                	jne    ffffffff810ffe18 <putback_lru_page+0x78>
> ffffffff810ffe05:	48 89 df             	mov    %rbx,%rdi
> ffffffff810ffe08:	e8 93 c0 ff ff       	callq  ffffffff810fbea0 <put_page>
> ffffffff810ffe0d:	0f 1f 00             	nopl   (%rax)
> ffffffff810ffe10:	eb ae                	jmp    ffffffff810ffdc0 <putback_lru_page+0x20>	; goto redo;
> ffffffff810ffe12:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
> 
> /* } */
> 
> /* if (was_unevictable && lru != LRU_UNEVICTABLE) */
> 	/* skip... */
> 
> /* else if (!was_unevictable && lru == LRU_UNEVICTABLE) */
> ffffffff810ffe18:	4d 85 ed             	test   %r13,%r13		; !was_unevictable, and assume lru == LRU_UNEVICTABLE
> ffffffff810ffe1b:	75 09                	jne    ffffffff810ffe26 <putback_lru_page+0x86>
> ffffffff810ffe1d:	65 48 ff 04 25 68 f0 	incq   %gs:0xf068	; it is for count_vm_event(UNEVICTABLE_PGCULLED)
> 									; and "incq   %gs:0xf078" is for count_vm_event(UNEVICTABLE_PGRESCUED)
> ffffffff810ffe24:	00 00 
> 
> /* put_page(); */
> ffffffff810ffe26:	48 89 df             	mov    %rbx,%rdi
> ffffffff810ffe29:	e8 72 c0 ff ff       	callq  ffffffff810fbea0 <put_page>
> ffffffff810ffe2e:	48 83 c4 08          	add    $0x8,%rsp
> ffffffff810ffe32:	5b                   	pop    %rbx
> ffffffff810ffe33:	41 5c                	pop    %r12
> ffffffff810ffe35:	41 5d                	pop    %r13
> ffffffff810ffe37:	5d                   	pop    %rbp
> ffffffff810ffe38:	c3                   	retq   
> ffffffff810ffe39:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
> 
> 
> ------------------------------analyzing end-----------------------------------
> 
> 
> 
> Thanks.
> 


-- 
Chen Gang

--
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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-07-08  6:43       ` Chen Gang
@ 2013-07-09  2:16         ` Chen Gang
  0 siblings, 0 replies; 9+ messages in thread
From: Chen Gang @ 2013-07-09  2:16 UTC (permalink / raw)
  To: Andrew Morton; +Cc: Mel Gorman, hannes, riel, mhocko, linux-mm, linux-kernel

On 07/08/2013 02:43 PM, Chen Gang wrote:
> On 07/05/2013 12:06 PM, Chen Gang wrote:
>> On 06/19/2013 03:19 PM, Chen Gang wrote:
>>> On 06/19/2013 03:10 PM, Andrew Morton wrote:
>>>> On Wed, 19 Jun 2013 14:55:13 +0800 Chen Gang <gang.chen@asianux.com> wrote:
>>>>
>>>>>>
>>>>>> 'lru' may be used without initialized, so need regressing part of the
>>>>>> related patch.
>>>>>>
>>>>>> The related patch:
>>>>>>   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
>>>>>>
>>>>>> ...
>>>>>>
>>>>>> --- a/mm/vmscan.c
>>>>>> +++ b/mm/vmscan.c
>>>>>> @@ -595,6 +595,7 @@ redo:
>>>>>>  		 * unevictable page on [in]active list.
>>>>>>  		 * We know how to handle that.
>>>>>>  		 */
>>>>>> +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>>>>>>  		lru_cache_add(page);
>>>>>>  	} else {
>>>>>>  		/*
>>>> That looks right.  Why the heck didn't gcc-4.4.4 (at least) warn about it?
>>>>
>>>
>>> Sorry I don't know either, I find it by reading code, this time.
>>>
>>> It is really necessary to continue analyzing why. In 2nd half of 2013, I
>>> have planned to make some patches outside kernel but related with kernel
>>> (e.g. LTP, gcc patches).
>>>
>>> This kind of issue is a good chance for me to start in 2nd half of 2013
>>> (start from next month).
>>>
>>> So if no others reply for it, I will start analyzing it in the next
>>> month, and plan to finish within a month (before 2013-07-31).
>>>
>>>
>>> Welcome additional suggestions or completions.
>>>
>>> Thanks.
>>>

I create a related bug for it in gcc, please reference:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57856

Next, I will communicate about it with gcc guys, if any member is
interested in it, please tracing it in gcc bugzilla (bug57856).

Now, truly end of this thread in kernel mailing list.

Thanks.

> 
> Under the gcc which from the source code in svn. it still has this
> issue. I should communicate with gcc mailing list (or their bugzilla)
> for it.
> 
> I got gcc source code from svn, "configure && make && make install".
> 
> [root@gchenlinux linux-next]# which gcc
> /usr/local/bin/gcc
> [root@gchenlinux linux-next]# gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
> Target: x86_64-unknown-linux-gnu
> Configured with: ./configure
> Thread model: posix
> gcc version 4.9.0 20130704 (experimental) (GCC) 
> 
> 
> I think, this thread is the end under kernel mailing list. ;-)
> 
> Thanks.
> 
>>
>> Under gcc 4.7.2 20120921 (Red Hat 4.7.2-2) also cause this issue.
>>
>> The root cause is:
>>
>>   for putback_lur_page() in mm/vmscan.c for next-20130621 tree.
>>   the compiler assumes "lru == LRU_UNEVICTABLE" instead of report warnings (uninitializing lru)
>>
>> The details are below, and the related info and warn are in
>> attachments, please check, thanks.
>>
>> Next, I will compile gcc compiler with the gcc latest code, if also has
>> this issue, I should communicate with gcc mailing list for it.
>>
>> Thanks.
>>
>> ------------------------------analyzing begin---------------------------------
>>
>> /* source code in mm/vmscan.c for next-20130621 */
>>
>>  580 void putback_lru_page(struct page *page)
>>  581 {
>>  582         int lru;
>>  583         int was_unevictable = PageUnevictable(page);
>>  584 
>>  585         VM_BUG_ON(PageLRU(page));
>>  586 
>>  587 redo:
>>  588         ClearPageUnevictable(page);
>>  589 
>>  590         if (page_evictable(page)) {
>>  591                 /*
>>  592                  * For evictable pages, we can use the cache.
>>  593                  * In event of a race, worst case is we end up with an
>>  594                  * unevictable page on [in]active list.
>>  595                  * We know how to handle that.
>>  596                  */
>>  597                 lru_cache_add(page);
>>  598         } else {
>>  599                 /*
>>  600                  * Put unevictable pages directly on zone's unevictable
>>  601                  * list.
>>  602                  */
>>  603                 lru = LRU_UNEVICTABLE;
>>  604                 add_page_to_unevictable_list(page);
>>  605                 /*
>>  606                  * When racing with an mlock or AS_UNEVICTABLE clearing
>>  607                  * (page is unlocked) make sure that if the other thread
>>  608                  * does not observe our setting of PG_lru and fails
>>  609                  * isolation/check_move_unevictable_pages,
>>  610                  * we see PG_mlocked/AS_UNEVICTABLE cleared below and move
>>  611                  * the page back to the evictable list.
>>  612                  *
>>  613                  * The other side is TestClearPageMlocked() or shmem_lock().
>>  614                  */
>>  615                 smp_mb();
>>  616         }
>>  617 
>>  618         /*
>>  619          * page's status can change while we move it among lru. If an evictable
>>  620          * page is on unevictable list, it never be freed. To avoid that,
>>  621          * check after we added it to the list, again.
>>  622          */
>>  623         if (lru == LRU_UNEVICTABLE && page_evictable(page)) {
>>  624                 if (!isolate_lru_page(page)) {
>>  625                         put_page(page);
>>  626                         goto redo;
>>  627                 }
>>  628                 /* This means someone else dropped this page from LRU
>>  629                  * So, it will be freed or putback to LRU again. There is
>>  630                  * nothing to do here.
>>  631                  */
>>  632         }
>>  633 
>>  634         if (was_unevictable && lru != LRU_UNEVICTABLE)
>>  635                 count_vm_event(UNEVICTABLE_PGRESCUED);
>>  636         else if (!was_unevictable && lru == LRU_UNEVICTABLE)
>>  637                 count_vm_event(UNEVICTABLE_PGCULLED);
>>  638 
>>  639         put_page(page);         /* drop ref from isolate */
>>  640 }
>>
>>
>> /*
>>  * Related disassemble code:
>>  *   make defconfig under x86_64 PC.
>>  *   make menuconfig (choose "Automount devtmpfs at /dev..." and KGDB)
>>  *   make V=1 EXTRA_CFLAGS=-W (not find related warnings, ref warn.log in attachment)
>>  *   objdump -d vmlinux > vmlinux.S
>>  *   vi vmlinux.S
>>  *
>>  * The issue is: compiler assumes "lru == LRU_UNEVICTABLE" instead of report warnings (uninitializing lru)
>>  */
>>
>> ffffffff810ffda0 <putback_lru_page>:
>> ffffffff810ffda0:	55                   	push   %rbp
>> ffffffff810ffda1:	48 89 e5             	mov    %rsp,%rbp
>> ffffffff810ffda4:	41 55                	push   %r13
>> ffffffff810ffda6:	41 54                	push   %r12
>> ffffffff810ffda8:	4c 8d 67 02          	lea    0x2(%rdi),%r12		; %r12 for ClearPageUnevictable(page);
>> ffffffff810ffdac:	53                   	push   %rbx
>> ffffffff810ffdad:	48 89 fb             	mov    %rdi,%rbx		; %rbx = page
>> ffffffff810ffdb0:	48 83 ec 08          	sub    $0x8,%rsp		; for lru, was_unevictable, but not used.
>>
>> ffffffff810ffdb4:	4c 8b 2f             	mov    (%rdi),%r13		; %r13 = "was_unevictable = PageUnevictable(page);"
>> ffffffff810ffdb7:	49 c1 ed 14          	shr    $0x14,%r13
>> ffffffff810ffdbb:	41 83e5 01          	and    $0x1,%r13d
>> ffffffff810ffdbf:	90                   	nop
>>
>> /* redo */
>> ffffffff810ffdc0:	f0 41 80 24 24 ef    	lock andb $0xef,(%r12)		; ClearPageUnevictable(page);
>>
>> /* if (page_evictable(page)) { */
>> ffffffff810ffdc6:	48 89 df             	mov    %rbx,%rdi
>> ffffffff810ffdc9:	e8 92 ff ff ff       	callq  ffffffff810ffd60 <page_evictable>
>> ffffffff810ffdce:	85 c0                	test   %eax,%eax
>> ffffffff810ffdd0:	48 89 df             	mov    %rbx,%rdi
>> ffffffff810ffdd3:	74 0b                	je     ffffffff810ffde0 <putback_lru_page+0x40>
>>
>> ffffffff810ffdd5:	e8 96 c5 ff ff       	callq  ffffffff810fc370 <lru_cache_add>
>> ffffffff810ffdda:	eb 0c                	jmp    ffffffff810ffde8 <putback_lru_page+0x48>
>> ffffffff810ffddc:	0f 1f 40 00          	nopl   0x0(%rax)
>>
>> /* } else { */
>> 						; assume lru == LRU_UNEVICTABLE
>> ffffffff810ffde0:	e8 ab c5 ff ff       	callq  ffffffff810fc390 <add_page_to_unevictable_list>
>> ffffffff810ffde5:	0f ae f0             	mfence 
>>
>> /* } */
>>
>> /* if (lru == LRU_UNEVICTABLE && page_evictable(page)) { */
>> ffffffff810ffde8:	48 89 df             	mov    %rbx,%rdi
>> ffffffff810ffdeb:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
>> ffffffff810ffdf0:	e8 6b ff ff ff       	callq  ffffffff810ffd60 <page_evictable>
>> ffffffff810ffdf5:	85 c0                	test   %eax,%eax
>> ffffffff810ffdf7:	74 1f                	je     ffffffff810ffe18 <putback_lru_page+0x78>  ; assume lru == LRU_UNEVICTABLE
>>
>> ffffffff810ffdf9:	48 89 df             	mov    %rbx,%rdi
>> ffffffff810ffdfc:	e8 0f fb ff ff       	callq  ffffffff810ff910 <isolate_lru_page>
>> ffffffff810ffe01:	85 c0                	test   %eax,%eax
>> ffffffff810ffe03:	75 13                	jne    ffffffff810ffe18 <putback_lru_page+0x78>
>> ffffffff810ffe05:	48 89 df             	mov    %rbx,%rdi
>> ffffffff810ffe08:	e8 93 c0 ff ff       	callq  ffffffff810fbea0 <put_page>
>> ffffffff810ffe0d:	0f 1f 00             	nopl   (%rax)
>> ffffffff810ffe10:	eb ae                	jmp    ffffffff810ffdc0 <putback_lru_page+0x20>	; goto redo;
>> ffffffff810ffe12:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
>>
>> /* } */
>>
>> /* if (was_unevictable && lru != LRU_UNEVICTABLE) */
>> 	/* skip... */
>>
>> /* else if (!was_unevictable && lru == LRU_UNEVICTABLE) */
>> ffffffff810ffe18:	4d 85 ed             	test   %r13,%r13		; !was_unevictable, and assume lru == LRU_UNEVICTABLE
>> ffffffff810ffe1b:	75 09                	jne    ffffffff810ffe26 <putback_lru_page+0x86>
>> ffffffff810ffe1d:	65 48 ff 04 25 68 f0 	incq   %gs:0xf068	; it is for count_vm_event(UNEVICTABLE_PGCULLED)
>> 									; and "incq   %gs:0xf078" is for count_vm_event(UNEVICTABLE_PGRESCUED)
>> ffffffff810ffe24:	00 00 
>>
>> /* put_page(); */
>> ffffffff810ffe26:	48 89 df             	mov    %rbx,%rdi
>> ffffffff810ffe29:	e8 72 c0 ff ff       	callq  ffffffff810fbea0 <put_page>
>> ffffffff810ffe2e:	48 83 c4 08          	add    $0x8,%rsp
>> ffffffff810ffe32:	5b                   	pop    %rbx
>> ffffffff810ffe33:	41 5c                	pop    %r12
>> ffffffff810ffe35:	41 5d                	pop    %r13
>> ffffffff810ffe37:	5d                   	pop    %rbp
>> ffffffff810ffe38:	c3                   	retq   
>> ffffffff810ffe39:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
>>
>>
>> ------------------------------analyzing end-----------------------------------
>>
>>
>>
>> Thanks.
>>
> 
> 


-- 
Chen Gang

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-06-19  6:55 [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree Chen Gang
  2013-06-19  7:10 ` Andrew Morton
@ 2013-06-19  8:53 ` Mel Gorman
  2013-06-19  9:56   ` Chen Gang
  1 sibling, 1 reply; 9+ messages in thread
From: Mel Gorman @ 2013-06-19  8:53 UTC (permalink / raw)
  To: Chen Gang; +Cc: hannes, riel, mhocko, Andrew Morton, linux-mm, linux-kernel

On Wed, Jun 19, 2013 at 02:55:13PM +0800, Chen Gang wrote:
> 
> 'lru' may be used without initialized, so need regressing part of the
> related patch.
> 
> The related patch:
>   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
> 
> 
> Signed-off-by: Chen Gang <gang.chen@asianux.com>
> ---
>  mm/vmscan.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index fe73724..e92b1858 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -595,6 +595,7 @@ redo:
>  		 * unevictable page on [in]active list.
>  		 * We know how to handle that.
>  		 */
> +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>  		lru_cache_add(page);

Thanks for catching this but I have one question. Why are you clearing
the active bit?

Before 3abf380 we did

active = TestClearPageActive(page);
lru = active + page_lru_base_type(page);
lru_cache_add_lru(page, lru);

so if the page was active before then it gets added to the active list. When
3abf380 is applied. it becomes.

Leave PageActive alone
lru_cache_add(page);
..... until __pagevec_lru_add -> __pagevec_lru_add_fn
int file = page_is_file_cache(page);
int active = PageActive(page);
enum lru_list lru = page_lru(page);

After your patch it's

Clear PageActive
lru_cache_add(page)
.......
always add to inactive list

I do not think you intended to do this and if you did, it deserves far
more comment than being a compile warning fix. In putback_lru_page we only
care about whether the lru was unevictable or not. Hence I think what you
meant to do was simply

	lru = page_lru_base_type(page);

If you agree then can you resend a revised version to Andrew please?

-- 
Mel Gorman
SUSE Labs

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-06-19  8:53 ` Mel Gorman
@ 2013-06-19  9:56   ` Chen Gang
  2013-06-19 10:25     ` [PATCH v2] " Chen Gang
  0 siblings, 1 reply; 9+ messages in thread
From: Chen Gang @ 2013-06-19  9:56 UTC (permalink / raw)
  To: Mel Gorman; +Cc: hannes, riel, mhocko, Andrew Morton, linux-mm, linux-kernel

On 06/19/2013 04:53 PM, Mel Gorman wrote:
> On Wed, Jun 19, 2013 at 02:55:13PM +0800, Chen Gang wrote:
>> > 
>> > 'lru' may be used without initialized, so need regressing part of the
>> > related patch.
>> > 
>> > The related patch:
>> >   "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"
>> > 
>> > 
>> > Signed-off-by: Chen Gang <gang.chen@asianux.com>
>> > ---
>> >  mm/vmscan.c |    1 +
>> >  1 files changed, 1 insertions(+), 0 deletions(-)
>> > 
>> > diff --git a/mm/vmscan.c b/mm/vmscan.c
>> > index fe73724..e92b1858 100644
>> > --- a/mm/vmscan.c
>> > +++ b/mm/vmscan.c
>> > @@ -595,6 +595,7 @@ redo:
>> >  		 * unevictable page on [in]active list.
>> >  		 * We know how to handle that.
>> >  		 */
>> > +		lru = !!TestClearPageActive(page) + page_lru_base_type(page);
>> >  		lru_cache_add(page);
> Thanks for catching this but I have one question. Why are you clearing
> the active bit?
> 

Oh, it is my fault, I only want to regress part of the original patch,
did not notice clearing the active bit.


> Before 3abf380 we did
> 
> active = TestClearPageActive(page);
> lru = active + page_lru_base_type(page);
> lru_cache_add_lru(page, lru);
> 
> so if the page was active before then it gets added to the active list. When
> 3abf380 is applied. it becomes.
> 
> Leave PageActive alone
> lru_cache_add(page);
> .... until __pagevec_lru_add -> __pagevec_lru_add_fn
> int file = page_is_file_cache(page);
> int active = PageActive(page);
> enum lru_list lru = page_lru(page);
> 
> After your patch it's
> 
> Clear PageActive
> lru_cache_add(page)
> ......
> always add to inactive list
> 
> I do not think you intended to do this and if you did, it deserves far
> more comment than being a compile warning fix. In putback_lru_page we only
> care about whether the lru was unevictable or not. Hence I think what you
> meant to do was simply
> 
> 	lru = page_lru_base_type(page);
> 
> If you agree then can you resend a revised version to Andrew please?

Yes, I should do, but excuse me, I do not quite know about 'revised
version'.

I guess it means I need still send the related patch which base on the
original one, e.g. for next-20130618:

------------------------diff begin-------------------------------------

diff --git a/mm/vmscan.c b/mm/vmscan.c
index fe73724..d03facb 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -595,6 +595,7 @@ redo:
 		 * unevictable page on [in]active list.
 		 * We know how to handle that.
 		 */
+		lru = page_lru_base_type(page);
 		lru_cache_add(page);
 	} else {
 		/*

------------------------diff end---------------------------------------

Is it correct ?


Thanks.
-- 
Chen Gang

Asianux Corporation

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v2] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree
  2013-06-19  9:56   ` Chen Gang
@ 2013-06-19 10:25     ` Chen Gang
  0 siblings, 0 replies; 9+ messages in thread
From: Chen Gang @ 2013-06-19 10:25 UTC (permalink / raw)
  To: Mel Gorman; +Cc: hannes, riel, mhocko, Andrew Morton, linux-mm, linux-kernel


'lru' may be used without initialized, so need regressing part of the
related patch.

The related patch:
  "3abf380 mm: remove lru parameter from __lru_cache_add and lru_cache_add_lru"


Signed-off-by: Chen Gang <gang.chen@asianux.com>
---
 mm/vmscan.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index fe73724..d03facb 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -595,6 +595,7 @@ redo:
 		 * unevictable page on [in]active list.
 		 * We know how to handle that.
 		 */
+		lru = page_lru_base_type(page);
 		lru_cache_add(page);
 	} else {
 		/*
-- 
1.7.7.6

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^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2013-07-09  2:17 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-06-19  6:55 [PATCH] mm/vmscan.c: 'lru' may be used without initialized after the patch "3abf380..." in next-20130607 tree Chen Gang
2013-06-19  7:10 ` Andrew Morton
2013-06-19  7:19   ` Chen Gang
2013-07-05  4:06     ` Chen Gang
2013-07-08  6:43       ` Chen Gang
2013-07-09  2:16         ` Chen Gang
2013-06-19  8:53 ` Mel Gorman
2013-06-19  9:56   ` Chen Gang
2013-06-19 10:25     ` [PATCH v2] " Chen Gang

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