diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 83ba13ad31e1..1333d25163bb 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -697,20 +697,22 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, /* * Uncharging is always a welcome operation, we never complain, simply - * uncharge. This routine should be called with lock_page_cgroup held + * uncharge. */ -void mem_cgroup_uncharge(struct page_cgroup *pc) +void mem_cgroup_uncharge_page(struct page *page) { + struct page_cgroup *pc; struct mem_cgroup *mem; struct mem_cgroup_per_zone *mz; - struct page *page; unsigned long flags; /* * Check if our page_cgroup is valid */ + lock_page_cgroup(page); + pc = page_get_page_cgroup(page); if (!pc) - return; + goto unlock; if (atomic_dec_and_test(&pc->ref_cnt)) { page = pc->page; @@ -731,12 +733,8 @@ void mem_cgroup_uncharge(struct page_cgroup *pc) } lock_page_cgroup(page); } -} -void mem_cgroup_uncharge_page(struct page *page) -{ - lock_page_cgroup(page); - mem_cgroup_uncharge(page_get_page_cgroup(page)); +unlock: unlock_page_cgroup(page); } @@ -759,12 +757,7 @@ int mem_cgroup_prepare_migration(struct page *page) void mem_cgroup_end_migration(struct page *page) { - struct page_cgroup *pc; - - lock_page_cgroup(page); - pc = page_get_page_cgroup(page); - mem_cgroup_uncharge(pc); - unlock_page_cgroup(page); + mem_cgroup_uncharge_page(page); } /* * We know both *page* and *newpage* are now not-on-LRU and Pg_locked. |