linux-kernel - Re: [PATCH v3] mm: add thp_utilization metrics to /proc/thp

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Date:   Sun, 7 Aug 2022 14:03:33 +0800
From:   kernel test robot <lkp@...el.com>
To:     alexlzhu@...com, linux-mm@...ck.org, kernel-team@...com,
        linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:     kbuild-all@...ts.01.org, Alexander Zhu <alexlzhu@...com>
Subject: Re: [PATCH v3] mm: add thp_utilization metrics to
 /proc/thp_utilization

Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.19]
[cannot apply to akpm-mm/mm-everything next-20220805]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/alexlzhu-fb-com/mm-add-thp_utilization-metrics-to-proc-thp_utilization/20220806-024150
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9e2f40233670c70c25e0681cb66d50d1e2742829
config: i386-randconfig-a001 (https://download.01.org/0day-ci/archive/20220807/202208071343.bwmuBz9l-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/c3896ed4c7d2319ac0880860a6bfc98e6eed3d66
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review alexlzhu-fb-com/mm-add-thp_utilization-metrics-to-proc-thp_utilization/20220806-024150
        git checkout c3896ed4c7d2319ac0880860a6bfc98e6eed3d66
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> mm/huge_memory.c:601:6: warning: no previous prototype for 'is_anon_transparent_hugepage' [-Wmissing-prototypes]
     601 | bool is_anon_transparent_hugepage(struct page *page)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   mm/huge_memory.c: In function 'thp_util_scan':
>> mm/huge_memory.c:3300:29: warning: variable 'head' set but not used [-Wunused-but-set-variable]
    3300 |         struct page *page, *head = NULL;
         |                             ^~~~


vim +/is_anon_transparent_hugepage +601 mm/huge_memory.c

   600	
 > 601	bool is_anon_transparent_hugepage(struct page *page)
   602	{
   603		return PageAnon(page) && is_transparent_hugepage(page);
   604	}
   605	EXPORT_SYMBOL_GPL(is_anon_transparent_hugepage);
   606	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp