diff options
| author | Adrian Bunk <bunk@stusta.de> | 2006-03-22 00:08:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-22 07:53:58 -0800 |
| commit | b50ec7d8070ae7a39fe78e65a8812bbc3ca2f7ac (patch) | |
| tree | 56a30fe319a1c4356547d13896d6762df76980d7 | |
| parent | a482289d46587ffcda4c85aab109fb74910d7a48 (diff) | |
| download | blackbird-op-linux-b50ec7d8070ae7a39fe78e65a8812bbc3ca2f7ac.tar.gz blackbird-op-linux-b50ec7d8070ae7a39fe78e65a8812bbc3ca2f7ac.zip | |
[PATCH] kcalloc(): INT_MAX -> ULONG_MAX
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 <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/slab.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 8cf52939d0ab..38bed95dda7a 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -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); } |
