diff options
| -rw-r--r-- | mm/memcontrol.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 975e89935d5..160101a05b4 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -456,16 +456,20 @@ int mem_cgroup_charge(struct page *page, struct mm_struct *mm, int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask) { + int ret = 0; struct mem_cgroup *mem; if (!mm) mm = &init_mm; + rcu_read_lock(); mem = rcu_dereference(mm->mem_cgroup); + css_get(&mem->css); + rcu_read_unlock(); if (mem->control_type == MEM_CGROUP_TYPE_ALL) - return mem_cgroup_charge_common(page, mm, gfp_mask, + ret = mem_cgroup_charge_common(page, mm, gfp_mask, MEM_CGROUP_CHARGE_TYPE_CACHE); - else - return 0; + css_put(&mem->css); + return ret; } /* |