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mm/slub.c: avoid double string traverse in kmem_cache_flags()

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If ',' is not found, kmem_cache_flags() calls strlen() to find the end of
line.  We can do it in a single pass using strchrnul().

Link: http://lkml.kernel.org/r/20190501053111.7950-1-ynorov@marvell.com
Signed-off-by: Yury Norov <ynorov@marvell.com>
Acked-by: Aaron Tomlin <atomlin@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yury Norov 2019-07-11 20:53:33 -07:00 • committed by Linus Torvalds
parent 966fede8e4
commit 9cf3a8d847
1 changed files with 1 additions and 3 deletions
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4
mm/slub.c
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@ -1313,9 +1313,7 @@ slab_flags_t kmem_cache_flags(unsigned int object_size,
char *end, *glob;
size_t cmplen;
end = strchr(iter, ',');
if (!end)
end = iter + strlen(iter);
end = strchrnul(iter, ',');
glob = strnchr(iter, end - iter, '*');
if (glob)