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| author |   Akinobu Mita <akinobu.mita@gmail.com> | 2011-10-31 17:08:07 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-31 17:30:47 -0700 |
| commit | 798248206b59acc6e1238c778281419c041891a7 (patch) | |
| tree | ff8564431367b442b18bca4a0a9732e5799e2391 /include/linux/string.h | |
| parent | mm/debug-pagealloc.c: use plain __ratelimit() instead of printk_ratelimit() (diff) | |
| download | wireguard-linux-798248206b59acc6e1238c778281419c041891a7.tar.xz wireguard-linux-798248206b59acc6e1238c778281419c041891a7.zip | |
lib/string.c: introduce memchr_inv()
memchr_inv() is mainly used to check whether the whole buffer is filled
with just a specified byte.
The function name and prototype are stolen from logfs and the
implementation is from SLUB.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Christoph Lameter <cl@linux-foundation.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Acked-by: Joern Engel <joern@logfs.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/string.h')
| -rw-r--r-- | include/linux/string.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/string.h b/include/linux/string.h index a176db2f2c85..e033564f10ba 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -114,6 +114,7 @@ extern int memcmp(const void *,const void *,__kernel_size_t); #ifndef __HAVE_ARCH_MEMCHR extern void * memchr(const void *,int,__kernel_size_t); #endif +void *memchr_inv(const void *s, int c, size_t n); extern char *kstrdup(const char *s, gfp_t gfp); extern char *kstrndup(const char *s, size_t len, gfp_t gfp); |