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d="scan'208";a="6668339" Received: from igk-lkp-server01.igk.intel.com (HELO 58ca8a381a5c) ([10.211.93.152]) by fmviesa012.fm.intel.com with ESMTP; 28 Oct 2026 10:27:07 -0700 Received: from kbuild by 58ca8a381a5c with local (Exim 4.98.2) (envelope-from ) id 1xM7QV-000000004vr-0EJT; Wed, 28 Oct 2026 17:27:03 +0000 Date: Wed, 28 Oct 2026 18:26:39 +0100 From: kernel test robot To: cros-kernel-buildreports@googlegroups.com Cc: oe-kbuild-all@lists.linux.dev Subject: [android-common:android14-kiwi-6.1 353/353] mm/vmscan.c:997:15: warning: no previous prototype for function 'shrink_slab' Message-ID: <202610281813.P9NFHPgV-lkp@intel.com> User-Agent: s-nail v14.9.25 X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Hi huangshaobo1, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android14-kiwi-6.1 head: ffdb1830342c4c7db15068ca5cdcebb04dd14db6 commit: 09ab235661116880b7ea9b4deb705802f2c19ab4 [353/353] ANDROID: vendor_hooks: export shrink_slab config: arm-randconfig-r2303-20261026 (https://download.01.org/0day-ci/archive/20261028/202610281813.P9NFHPgV-lkp@intel.com/config) compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6) sparse: v0.6.5-rc1-1-gc4640450 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261028/202610281813.P9NFHPgV-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202610281813.P9NFHPgV-lkp@intel.com/ All warnings (new ones prefixed by >>): >> mm/vmscan.c:997:15: warning: no previous prototype for function 'shrink_slab' [-Wmissing-prototypes] unsigned long shrink_slab(gfp_t gfp_mask, int nid, ^ mm/vmscan.c:997:1: note: declare 'static' if the function is not intended to be used outside of this translation unit unsigned long shrink_slab(gfp_t gfp_mask, int nid, ^ static 1 warning generated. vim +/shrink_slab +997 mm/vmscan.c 976 977 /** 978 * shrink_slab - shrink slab caches 979 * @gfp_mask: allocation context 980 * @nid: node whose slab caches to target 981 * @memcg: memory cgroup whose slab caches to target 982 * @priority: the reclaim priority 983 * 984 * Call the shrink functions to age shrinkable caches. 985 * 986 * @nid is passed along to shrinkers with SHRINKER_NUMA_AWARE set, 987 * unaware shrinkers will receive a node id of 0 instead. 988 * 989 * @memcg specifies the memory cgroup to target. Unaware shrinkers 990 * are called only if it is the root cgroup. 991 * 992 * @priority is sc->priority, we take the number of objects and >> by priority 993 * in order to get the scan target. 994 * 995 * Returns the number of reclaimed slab objects. 996 */ > 997 unsigned long shrink_slab(gfp_t gfp_mask, int nid, 998 struct mem_cgroup *memcg, 999 int priority) 1000 { 1001 unsigned long ret, freed = 0; 1002 struct shrinker *shrinker; 1003 bool bypass = false; 1004 1005 trace_android_vh_shrink_slab_bypass(gfp_mask, nid, memcg, priority, &bypass); 1006 if (bypass) 1007 return 0; 1008 1009 /* 1010 * The root memcg might be allocated even though memcg is disabled 1011 * via "cgroup_disable=memory" boot parameter. This could make 1012 * mem_cgroup_is_root() return false, then just run memcg slab 1013 * shrink, but skip global shrink. This may result in premature 1014 * oom. 1015 */ 1016 if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) 1017 return shrink_slab_memcg(gfp_mask, nid, memcg, priority); 1018 1019 if (!down_read_trylock(&shrinker_rwsem)) 1020 goto out; 1021 1022 list_for_each_entry(shrinker, &shrinker_list, list) { 1023 struct shrink_control sc = { 1024 .gfp_mask = gfp_mask, 1025 .nid = nid, 1026 .memcg = memcg, 1027 }; 1028 1029 ret = do_shrink_slab(&sc, shrinker, priority); 1030 if (ret == SHRINK_EMPTY) 1031 ret = 0; 1032 freed += ret; 1033 /* 1034 * Bail out if someone want to register a new shrinker to 1035 * prevent the registration from being stalled for long periods 1036 * by parallel ongoing shrinking. 1037 */ 1038 if (rwsem_is_contended(&shrinker_rwsem)) { 1039 freed = freed ? : 1; 1040 break; 1041 } 1042 } 1043 1044 up_read(&shrinker_rwsem); 1045 out: 1046 cond_resched(); 1047 return freed; 1048 } 1049 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki