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memcg, kmem: use cache_from_memcg_idx instead of hard code

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Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Qiang Huang 2013-11-12 15:08:24 -08:00 committed by Linus Torvalds
parent 2ade4de871
commit 7a67d7abcc
1 changed files with 6 additions and 6 deletions
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12
mm/memcontrol.c
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@ -2956,7 +2956,7 @@ static struct kmem_cache *memcg_params_to_cache(struct memcg_cache_params *p)
VM_BUG_ON(p->is_root_cache);
cachep = p->root_cache;
return cachep->memcg_params->memcg_caches[memcg_cache_id(p->memcg)];
return cache_from_memcg_idx(cachep, memcg_cache_id(p->memcg));
}
#ifdef CONFIG_SLABINFO
@ -3393,7 +3393,7 @@ static struct kmem_cache *memcg_create_kmem_cache(struct mem_cgroup *memcg,
idx = memcg_cache_id(memcg);
mutex_lock(&memcg_cache_mutex);
new_cachep = cachep->memcg_params->memcg_caches[idx];
new_cachep = cache_from_memcg_idx(cachep, idx);
if (new_cachep) {
css_put(&memcg->css);
goto out;
@ -3439,8 +3439,8 @@ void kmem_cache_destroy_memcg_children(struct kmem_cache *s)
* we'll take the set_limit_mutex to protect ourselves against this.
*/
mutex_lock(&set_limit_mutex);
for (i = 0; i < memcg_limited_groups_array_size; i++) {
c = s->memcg_params->memcg_caches[i];
for_each_memcg_cache_index(i) {
c = cache_from_memcg_idx(s, i);
if (!c)
continue;
@ -3573,8 +3573,8 @@ struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep,
* code updating memcg_caches will issue a write barrier to match this.
*/
read_barrier_depends();
if (likely(cachep->memcg_params->memcg_caches[idx])) {
cachep = cachep->memcg_params->memcg_caches[idx];
if (likely(cache_from_memcg_idx(cachep, idx))) {
cachep = cache_from_memcg_idx(cachep, idx);
goto out;
}