From: Adrian Bunk Since size_t has the same size as a long on all architectures, it's enough for overflow checks to check against ULONG_MAX. This change could allow a compiler better optimization (especially in the n=1 case). The practical effect seems to be positive, but quite small: text data bss dec hex filename 21762380 5859870 1848928 29471178 1c1b1ca vmlinux-old 21762211 5859870 1848928 29471009 1c1b121 vmlinux-patched Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton --- include/linux/slab.h | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN include/linux/slab.h~kcalloc-int_max-ulong_max include/linux/slab.h --- devel/include/linux/slab.h~kcalloc-int_max-ulong_max 2006-01-29 00:10:40.000000000 -0800 +++ devel-akpm/include/linux/slab.h 2006-01-29 00:10:40.000000000 -0800 @@ -118,7 +118,7 @@ extern void *kzalloc(size_t, gfp_t); */ static inline void *kcalloc(size_t n, size_t size, gfp_t flags) { - if (n != 0 && size > INT_MAX / n) + if (n != 0 && size > ULONG_MAX / n) return NULL; return kzalloc(n * size, flags); } _