From: Xiongwei Song <xiongwei.song@xxxxxxxxx> The only user of prepare_slab_obj_exts_hook() is alloc_tagging_slab_alloc_hook(), which can build with CONFIG_MEM_ALLOC_PROFILING enabled. So, the warning was triggerred when disabling CONFIG_MEM_ALLOC_PROFILING. Let's add "__maybe_unused" for prepare_slab_obj_exts_hook(). Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202407050845.zNONqauD-lkp@xxxxxxxxx/ Signed-off-by: Xiongwei Song <xiongwei.song@xxxxxxxxx> --- mm/slub.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index ce39544acf7c..2e26f20759c0 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2027,7 +2027,7 @@ static inline bool need_slab_obj_ext(void) return false; } -static inline struct slabobj_ext * +static inline struct slabobj_ext * __maybe_unused prepare_slab_obj_exts_hook(struct kmem_cache *s, gfp_t flags, void *p) { struct slab *slab; @@ -2068,7 +2068,7 @@ static inline bool need_slab_obj_ext(void) return false; } -static inline struct slabobj_ext * +static inline struct slabobj_ext * __maybe_unused prepare_slab_obj_exts_hook(struct kmem_cache *s, gfp_t flags, void *p) { return NULL; -- 2.34.1
