tree: git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git slab/for-next head: b6f00c4ef02065161c09fdf560e492cfbb1fec0a commit: 1c5610f451be71ca2f8b9c6b86ef4712aeed6437 [11/12] slub: introduce count_partial_free_approx() config: arc-randconfig-001-20240423 (https://download.01.org/0day-ci/archive/20240423/202404231048.ucsxSmAS-lkp@xxxxxxxxx/config) compiler: arceb-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240423/202404231048.ucsxSmAS-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202404231048.ucsxSmAS-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/arc/include/asm/ptrace.h:11, from arch/arc/include/asm/bug.h:11, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/mm.h:6, from mm/slub.c:13: mm/slub.c: In function 'count_partial_free_approx': mm/slub.c:3256:28: error: implicit declaration of function 'node_nr_objs'; did you mean 'node_nr_slabs'? [-Werror=implicit-function-declaration] 3256 | x = min(x, node_nr_objs(n)); | ^~~~~~~~~~~~ include/linux/compiler.h:284:55: note: in definition of macro '__is_constexpr' 284 | (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) | ^ include/linux/minmax.h:85:25: note: in expansion of macro '__careful_cmp' 85 | #define min(x, y) __careful_cmp(min, x, y) | ^~~~~~~~~~~~~ mm/slub.c:3256:21: note: in expansion of macro 'min' 3256 | x = min(x, node_nr_objs(n)); | ^~~ In file included from include/linux/init.h:5, from include/linux/printk.h:6, from include/asm-generic/bug.h:22, from arch/arc/include/asm/bug.h:30: include/linux/build_bug.h:78:41: error: static assertion failed: "min(x, node_nr_objs(n)) signedness error, fix types or consider umin() before min_t()" 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) | ^~~~~~~~~~~~~~ include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) | ^~~~~~~~~~~~~~~ include/linux/minmax.h:51:9: note: in expansion of macro 'static_assert' 51 | static_assert(__types_ok(x, y), \ | ^~~~~~~~~~~~~ include/linux/minmax.h:58:17: note: in expansion of macro '__cmp_once' 58 | __cmp_once(op, x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y))) | ^~~~~~~~~~ include/linux/minmax.h:85:25: note: in expansion of macro '__careful_cmp' 85 | #define min(x, y) __careful_cmp(min, x, y) | ^~~~~~~~~~~~~ mm/slub.c:3256:21: note: in expansion of macro 'min' 3256 | x = min(x, node_nr_objs(n)); | ^~~ mm/slub.c: At top level: >> mm/slub.c:3227:22: warning: 'count_partial_free_approx' defined but not used [-Wunused-function] 3227 | static unsigned long count_partial_free_approx(struct kmem_cache_node *n) | ^~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/count_partial_free_approx +3227 mm/slub.c 3226 > 3227 static unsigned long count_partial_free_approx(struct kmem_cache_node *n) 3228 { 3229 unsigned long flags; 3230 unsigned long x = 0; 3231 struct slab *slab; 3232 3233 spin_lock_irqsave(&n->list_lock, flags); 3234 if (n->nr_partial <= MAX_PARTIAL_TO_SCAN) { 3235 list_for_each_entry(slab, &n->partial, slab_list) 3236 x += slab->objects - slab->inuse; 3237 } else { 3238 /* 3239 * For a long list, approximate the total count of objects in 3240 * it to meet the limit on the number of slabs to scan. 3241 * Scan from both the list's head and tail for better accuracy. 3242 */ 3243 unsigned long scanned = 0; 3244 3245 list_for_each_entry(slab, &n->partial, slab_list) { 3246 x += slab->objects - slab->inuse; 3247 if (++scanned == MAX_PARTIAL_TO_SCAN / 2) 3248 break; 3249 } 3250 list_for_each_entry_reverse(slab, &n->partial, slab_list) { 3251 x += slab->objects - slab->inuse; 3252 if (++scanned == MAX_PARTIAL_TO_SCAN) 3253 break; 3254 } 3255 x = mult_frac(x, n->nr_partial, scanned); 3256 x = min(x, node_nr_objs(n)); 3257 } 3258 spin_unlock_irqrestore(&n->list_lock, flags); 3259 return x; 3260 } 3261 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
