From 5ff172f6c94d282d83cb88bdfec5f647ad9c6105 Mon Sep 17 00:00:00 2001 From: Marco Elver Date: Tue, 21 Jul 2026 11:19:21 +0200 Subject: [PATCH] slab: silence sparse warning with type-based partitioning Sparse does not know __builtin_infer_alloc_token() and complains: sparse: sparse: undefined identifier '__builtin_infer_alloc_token' Fix it by using a dummy variant of __kmalloc_token() if __CHECKER__ is defined. Fixes: feb662d9168b ("slab: support for compiler-assisted type-based slab cache partitioning") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202607110912.nZTqfCrH-lkp@intel.com/ Signed-off-by: Marco Elver Link: https://patch.msgid.link/20260721092005.1986693-1-elver@google.com Acked-by: Harry Yoo (Oracle) Signed-off-by: Vlastimil Babka (SUSE) --- include/linux/slab.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/slab.h b/include/linux/slab.h index 3a14df50766a..32c9f8ed7ae2 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -514,8 +514,12 @@ typedef struct { unsigned long v; } kmalloc_token_t; extern unsigned long random_kmalloc_seed; #define __kmalloc_token(...) ((kmalloc_token_t){ .v = _CODE_LOCATION_ }) #elif defined(CONFIG_KMALLOC_PARTITION_TYPED) +#ifdef __CHECKER__ +#define __kmalloc_token(...) ((kmalloc_token_t){ .v = 0 }) +#else /* !__CHECKER__ */ #define __kmalloc_token(...) ((kmalloc_token_t){ .v = __builtin_infer_alloc_token(__VA_ARGS__) }) -#endif +#endif /* __CHECKER__ */ +#endif /* CONFIG_KMALLOC_PARTITION_TYPED */ #define DECL_TOKEN_PARAM(_token) , kmalloc_token_t (_token) #define _PASS_TOKEN_PARAM(_token) , (_token) #define PASS_TOKEN_PARAM(_token) (_token)