From: Rong Chen <rong.a.chen@intel.com>
To: Wei Yang <richard.weiyang@gmail.com>
Cc: kbuild test robot <lkp@intel.com>,
kbuild-all@01.org, linux-mm@kvack.org,
mgorman@techsingularity.net, akpm@linux-foundation.org
Subject: Re: [PATCH 1/2] mm, pageblock: make sure pageblock won't exceed mem_sectioin
Date: Thu, 13 Dec 2018 13:02:21 +0800 [thread overview]
Message-ID: <b036dab0-6822-3a8f-b2ce-4a979506172d@intel.com> (raw)
In-Reply-To: <20181213030832.whutggpzdy336u6y@master>
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On 12/13/2018 11:08 AM, Wei Yang wrote:
> On Thu, Dec 13, 2018 at 10:26:41AM +0800, Rong Chen wrote:
>>
>> On 12/09/2018 08:03 PM, Wei Yang wrote:
>>> On Sat, Dec 08, 2018 at 09:42:29AM +0800, kbuild test robot wrote:
>>>> Hi Wei,
>>>>
>>>> Thank you for the patch! Perhaps something to improve:
>>>>
>>>> [auto build test WARNING on linus/master]
>>>> [also build test WARNING on v4.20-rc5 next-20181207]
>>>> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>>>>
>>>> url: https://github.com/0day-ci/linux/commits/Wei-Yang/mm-pageblock-make-sure-pageblock-won-t-exceed-mem_sectioin/20181207-030601
>>>> config: powerpc-allmodconfig (attached as .config)
>>>> compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
>>>> reproduce:
>>>> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>>> chmod +x ~/bin/make.cross
>>>> # save the attached .config to linux build tree
>>>> GCC_VERSION=7.2.0 make.cross ARCH=powerpc
>>>>
>>>> All warnings (new ones prefixed by >>):
>>>>
>>>> In file included from include/linux/gfp.h:6:0,
>>>> from include/linux/xarray.h:14,
>>>> from include/linux/radix-tree.h:31,
>>>> from include/linux/fs.h:15,
>>>> from include/linux/compat.h:17,
>>>> from arch/powerpc/kernel/asm-offsets.c:16:
>>>>>> include/linux/mmzone.h:1088:6: warning: "pageblock_order" is not defined, evaluates to 0 [-Wundef]
>>>> #if (pageblock_order + PAGE_SHIFT) > SECTION_SIZE_BITS
>>>> ^~~~~~~~~~~~~~~
>>>> --
>>>> In file included from include/linux/gfp.h:6:0,
>>>> from include/linux/mm.h:10,
>>>> from mm//swap.c:16:
>>>>>> include/linux/mmzone.h:1088:6: warning: "pageblock_order" is not defined, evaluates to 0 [-Wundef]
>>>> #if (pageblock_order + PAGE_SHIFT) > SECTION_SIZE_BITS
>>>> ^~~~~~~~~~~~~~~
>>>> In file included from include/linux/gfp.h:6:0,
>>>> from include/linux/mm.h:10,
>>>> from mm//swap.c:16:
>>>>>> include/linux/mmzone.h:1088:6: warning: "pageblock_order" is not defined, evaluates to 0 [-Wundef]
>>>> #if (pageblock_order + PAGE_SHIFT) > SECTION_SIZE_BITS
>>>> ^~~~~~~~~~~~~~~
>>>>
>>>> vim +/pageblock_order +1088 include/linux/mmzone.h
>>>>
>>>> 1087
>>>>> 1088 #if (pageblock_order + PAGE_SHIFT) > SECTION_SIZE_BITS
>>>> 1089 #error Allocator pageblock_order exceeds SECTION_SIZE
>>>> 1090 #endif
>>>> 1091
>>>>
>>> I took a look at the latest code, at line 1082 of the same file uses
>>> pageblock_order. And I apply this patch on top of v4.20-rc5, the build
>>> looks good to me.
>>>
>>> Confused why this introduce an compile error.
>> Hi Wei,
>>
>> we could reproduce the warnings with using make.cross.
>>
> That's interesting.
>
> Do you see this file already use pageblock_order in line 1081?
>
> Is this one report warning?
>
both questions is yes.
Best Regards,
Rong Chen
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next prev parent reply other threads:[~2018-12-13 5:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-05 9:19 Wei Yang
2018-12-05 9:19 ` [PATCH 2/2] mm, page_alloc: cleanup usemap_size() when SPARSEMEM is not set Wei Yang
2018-12-07 9:58 ` Wei Yang
2018-12-05 11:15 ` [PATCH 1/2] mm, pageblock: make sure pageblock won't exceed mem_sectioin Mel Gorman
2018-12-05 12:08 ` Wei Yang
2018-12-05 15:37 ` Mel Gorman
2018-12-05 22:31 ` Wei Yang
2018-12-06 9:00 ` David Hildenbrand
2018-12-06 9:21 ` Wei Yang
2018-12-06 9:26 ` David Hildenbrand
2018-12-06 9:42 ` Wei Yang
2018-12-08 1:42 ` kbuild test robot
2018-12-09 12:03 ` Wei Yang
2018-12-13 2:26 ` Rong Chen
2018-12-13 3:08 ` Wei Yang
2018-12-13 5:02 ` Rong Chen [this message]
2018-12-13 7:28 ` Wei Yang
2018-12-09 13:58 ` kbuild test robot
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