From: "Paul E. McKenney" <paulmck@kernel.org>
To: kernel test robot <lkp@intel.com>
Cc: oe-kbuild-all@lists.linux.dev,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [linux-next:master 2555/3220] arch/csky/include/asm/cmpxchg.h:138:25: error: implicit declaration of function 'cmpxchg_emu_u8'
Date: Tue, 2 Apr 2024 10:26:22 -0700 [thread overview]
Message-ID: <eec09843-3962-4951-ad17-b15f2e311eb2@paulmck-laptop> (raw)
In-Reply-To: <202404022106.mYwpypit-lkp@intel.com>
On Tue, Apr 02, 2024 at 09:15:39PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: c0b832517f627ead3388c6f0c74e8ac10ad5774b
> commit: ea7f9bb7268e89fff8590ab5a360f5b27a0fc19a [2555/3220] csky: Emulate one-byte and two-byte cmpxchg
> config: csky-randconfig-r012-20230202 (https://download.01.org/0day-ci/archive/20240402/202404022106.mYwpypit-lkp@intel.com/config)
> compiler: csky-linux-gcc (GCC) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240402/202404022106.mYwpypit-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202404022106.mYwpypit-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
And yet again, does the patch at the end of this email clear this up
for you?
Thanx, Paul
> In file included from arch/csky/include/asm/atomic.h:9,
> from include/linux/atomic.h:7,
> from include/asm-generic/bitops/lock.h:5,
> from arch/csky/include/asm/bitops.h:69,
> from include/linux/bitops.h:68,
> from include/linux/log2.h:12,
> from kernel/bounds.c:13:
> include/linux/atomic/atomic-arch-fallback.h: In function 'raw_atomic_cmpxchg':
> >> arch/csky/include/asm/cmpxchg.h:138:25: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]
> 138 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^~~~~~~~~~~~~~
> arch/csky/include/asm/cmpxchg.h:165:10: note: in expansion of macro '__cmpxchg'
> 165 | (__cmpxchg((ptr), (o), (n), sizeof(*(ptr))))
> | ^~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:55:21: note: in expansion of macro 'arch_cmpxchg'
> 55 | #define raw_cmpxchg arch_cmpxchg
> | ^~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:2026:16: note: in expansion of macro 'raw_cmpxchg'
> 2026 | return raw_cmpxchg(&v->counter, old, new);
> | ^~~~~~~~~~~
> >> arch/csky/include/asm/cmpxchg.h:141:25: error: implicit declaration of function 'cmpxchg_emu_u16' [-Werror=implicit-function-declaration]
> 141 | __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
> | ^~~~~~~~~~~~~~~
> arch/csky/include/asm/cmpxchg.h:165:10: note: in expansion of macro '__cmpxchg'
> 165 | (__cmpxchg((ptr), (o), (n), sizeof(*(ptr))))
> | ^~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:55:21: note: in expansion of macro 'arch_cmpxchg'
> 55 | #define raw_cmpxchg arch_cmpxchg
> | ^~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:2026:16: note: in expansion of macro 'raw_cmpxchg'
> 2026 | return raw_cmpxchg(&v->counter, old, new);
> | ^~~~~~~~~~~
> cc1: some warnings being treated as errors
> make[3]: *** [scripts/Makefile.build:117: kernel/bounds.s] Error 1
> make[3]: Target 'prepare' not remade because of errors.
> make[2]: *** [Makefile:1197: prepare0] Error 2
> make[2]: Target 'prepare' not remade because of errors.
> make[1]: *** [Makefile:240: __sub-make] Error 2
> make[1]: Target 'prepare' not remade because of errors.
> make: *** [Makefile:240: __sub-make] Error 2
> make: Target 'prepare' not remade because of errors.
>
>
> vim +/cmpxchg_emu_u8 +138 arch/csky/include/asm/cmpxchg.h
>
> 125
> 126 #define arch_cmpxchg_acquire(ptr, o, n) \
> 127 (__cmpxchg_acquire((ptr), (o), (n), sizeof(*(ptr))))
> 128
> 129 #define __cmpxchg(ptr, old, new, size) \
> 130 ({ \
> 131 __typeof__(ptr) __ptr = (ptr); \
> 132 __typeof__(new) __new = (new); \
> 133 __typeof__(new) __tmp; \
> 134 __typeof__(old) __old = (old); \
> 135 __typeof__(*(ptr)) __ret; \
> 136 switch (size) { \
> 137 case 1: \
> > 138 __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> 139 break; \
> 140 case 2: \
> > 141 __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
> 142 break; \
> 143 case 4: \
> 144 asm volatile ( \
> 145 RELEASE_FENCE \
> 146 "1: ldex.w %0, (%3) \n" \
> 147 " cmpne %0, %4 \n" \
> 148 " bt 2f \n" \
> 149 " mov %1, %2 \n" \
> 150 " stex.w %1, (%3) \n" \
> 151 " bez %1, 1b \n" \
> 152 FULL_FENCE \
> 153 "2: \n" \
> 154 : "=&r" (__ret), "=&r" (__tmp) \
> 155 : "r" (__new), "r"(__ptr), "r"(__old) \
> 156 :); \
> 157 break; \
> 158 default: \
> 159 BUILD_BUG(); \
> 160 } \
> 161 __ret; \
> 162 })
> 163
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
------------------------------------------------------------------------
commit 58155a7e67f350f00c2df5b6066597fe438543cb
Author: Paul E. McKenney <paulmck@kernel.org>
Date: Tue Apr 2 10:24:57 2024 -0700
squash! csky: Emulate one-byte and two-byte cmpxchg
[ paulmck: Apply kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
diff --git a/arch/csky/include/asm/cmpxchg.h b/arch/csky/include/asm/cmpxchg.h
index 848a8691c5a2a..a3dc0a5b1cc3d 100644
--- a/arch/csky/include/asm/cmpxchg.h
+++ b/arch/csky/include/asm/cmpxchg.h
@@ -62,10 +62,10 @@
__typeof__(*(ptr)) __ret; \
switch (size) { \
case 1: \
- __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
+ __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \
break; \
case 2: \
- __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
+ __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \
break; \
case 4: \
asm volatile ( \
@@ -98,10 +98,10 @@
__typeof__(*(ptr)) __ret; \
switch (size) { \
case 1: \
- __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
+ __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \
break; \
case 2: \
- __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
+ __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \
break; \
case 4: \
asm volatile ( \
@@ -135,10 +135,10 @@
__typeof__(*(ptr)) __ret; \
switch (size) { \
case 1: \
- __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
+ __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \
break; \
case 2: \
- __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
+ __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, (uintptr_t)__old, (uintptr_t)__new); \
break; \
case 4: \
asm volatile ( \
next prev parent reply other threads:[~2024-04-02 17:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-02 13:15 kernel test robot
2024-04-02 17:26 ` Paul E. McKenney [this message]
2024-04-03 7:16 ` Yujie Liu
2024-04-03 22:20 ` Paul E. McKenney
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