linux-kernel - Re: [PATCH 2/2] mm: tlb: add tlb swap entries batch async release

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Message-ID: <202407311947.VPJNRqad-lkp@intel.com>
Date: Wed, 31 Jul 2024 19:49:18 +0800
From: kernel test robot <lkp@...el.com>
To: Zhiguo Jiang <justinjiang@...o.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Will Deacon <will@...nel.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@...nel.org>,
	Nick Piggin <npiggin@...nel.dk>, Arnd Bergmann <arnd@...db.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>, linux-arch@...r.kernel.org,
	cgroups@...r.kernel.org, Barry Song <21cnbao@...il.com>
Cc: oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	opensource.kernel@...o.com
Subject: Re: [PATCH 2/2] mm: tlb: add tlb swap entries batch async release

Hi Zhiguo,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Zhiguo-Jiang/mm-move-task_is_dying-to-h-headfile/20240730-215136
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240730114426.511-3-justinjiang%40vivo.com
patch subject: [PATCH 2/2] mm: tlb: add tlb swap entries batch async release
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20240731/202407311947.VPJNRqad-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240731/202407311947.VPJNRqad-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407311947.VPJNRqad-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/s390/include/asm/tlb.h:39,
                    from mm/oom_kill.c:49:
>> include/asm-generic/tlb.h:327:6: warning: no previous prototype for '__tlb_remove_swap_entries' [-Wmissing-prototypes]
     327 | bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/__tlb_remove_swap_entries +327 include/asm-generic/tlb.h

   323	
   324	extern bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
   325			swp_entry_t entry, int nr);
   326	#else
 > 327	bool __tlb_remove_swap_entries(struct mmu_gather *tlb,
   328			swp_entry_t entry, int nr)
   329	{
   330		return false;
   331	}
   332	#endif
   333	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki