diff options
| author | Andrzej Hajda <a.hajda@samsung.com> | 2015-02-14 01:36:38 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-14 08:21:36 +0300 |
| commit | 3dec16ea38afce38ceb49c8938901318797a08c4 (patch) | |
| tree | d40b51012496854360bc3292675cc3520ac4cbef /mm | |
| parent | 612936f21277d1254dd885de2e383aacdc7ca67f (diff) | |
| download | linux-3dec16ea38afce38ceb49c8938901318797a08c4.tar.xz | |
mm/slab: convert cache name allocations to kstrdup_const
slab frequently performs duplication of strings located in read-only
memory section. Replacing kstrdup by kstrdup_const allows to avoid such
operations.
[akpm@linux-foundation.org: make the handling of kmem_cache.name const-correct]
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
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>
Cc: Tejun Heo <tj@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/slab_common.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 1a1cc89acaa3..429a4506b382 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -295,8 +295,8 @@ unsigned long calculate_alignment(unsigned long flags, } static struct kmem_cache * -do_kmem_cache_create(char *name, size_t object_size, size_t size, size_t align, - unsigned long flags, void (*ctor)(void *), +do_kmem_cache_create(const char *name, size_t object_size, size_t size, + size_t align, unsigned long flags, void (*ctor)(void *), struct mem_cgroup *memcg, struct kmem_cache *root_cache) { struct kmem_cache *s; @@ -363,7 +363,7 @@ kmem_cache_create(const char *name, size_t size, size_t align, unsigned long flags, void (*ctor)(void *)) { struct kmem_cache *s; - char *cache_name; + const char *cache_name; int err; get_online_cpus(); @@ -390,7 +390,7 @@ kmem_cache_create(const char *name, size_t size, size_t align, if (s) goto out_unlock; - cache_name = kstrdup(name, GFP_KERNEL); + cache_name = kstrdup_const(name, GFP_KERNEL); if (!cache_name) { err = -ENOMEM; goto out_unlock; @@ -401,7 +401,7 @@ kmem_cache_create(const char *name, size_t size, size_t align, flags, ctor, NULL, NULL); if (IS_ERR(s)) { err = PTR_ERR(s); - kfree(cache_name); + kfree_const(cache_name); } out_unlock: @@ -607,7 +607,7 @@ void memcg_destroy_kmem_caches(struct mem_cgroup *memcg) void slab_kmem_cache_release(struct kmem_cache *s) { destroy_memcg_params(s); - kfree(s->name); + kfree_const(s->name); kmem_cache_free(kmem_cache, s); } |