The patch titled
Subject: mm/slub.c: avoid double string traverse in kmem_cache_flags()
has been added to the -mm tree. Its filename is
mm-slub-avoid-double-string-traverse-in-kmem_cache_flags.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-slub-avoid-double-string-traverse-in-kmem_cache_flags.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-avoid-double-string-traverse-in-kmem_cache_flags.patch
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------------------------------------------------------
From: Yury Norov <yury.norov@xxxxxxxxx>
Subject: mm/slub.c: avoid double string traverse in kmem_cache_flags()
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@xxxxxxxxxxx
Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxx>
Acked-by: Aaron Tomlin <atomlin@xxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slub.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/mm/slub.c~mm-slub-avoid-double-string-traverse-in-kmem_cache_flags
+++ a/mm/slub.c
@@ -1313,9 +1313,7 @@ slab_flags_t kmem_cache_flags(unsigned i
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)
_
Patches currently in -mm which might be from yury.norov@xxxxxxxxx are
mm-slub-avoid-double-string-traverse-in-kmem_cache_flags.patch
