X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=mm%2Fmemcontrol.c;h=7be9b35d7ffb293ac6296354ea1e3493d5ef09d6;hb=40d58138f832a48208cdce57d6572a033b1f7a23;hp=b6651277116737e3012b3ecca84aa6382b1a1be9;hpb=bd112db872c2f69993c86f458467acb4a14da010;p=linux-2.6-omap-h63xx.git

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b6651277116..7be9b35d7ff 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -994,14 +994,15 @@ static int mem_cgroup_move_account(struct page_cgroup *pc,
 	if (pc->mem_cgroup != from)
 		goto out;
 
-	css_put(&from->css);
 	res_counter_uncharge(&from->res, PAGE_SIZE);
 	mem_cgroup_charge_statistics(from, pc, false);
 	if (do_swap_account)
 		res_counter_uncharge(&from->memsw, PAGE_SIZE);
+	css_put(&from->css);
+
+	css_get(&to->css);
 	pc->mem_cgroup = to;
 	mem_cgroup_charge_statistics(to, pc, true);
-	css_get(&to->css);
 	ret = 0;
 out:
 	unlock_page_cgroup(pc);
@@ -1034,8 +1035,10 @@ static int mem_cgroup_move_parent(struct page_cgroup *pc,
 	if (ret || !parent)
 		return ret;
 
-	if (!get_page_unless_zero(page))
-		return -EBUSY;
+	if (!get_page_unless_zero(page)) {
+		ret = -EBUSY;
+		goto uncharge;
+	}
 
 	ret = isolate_lru_page(page);
 
@@ -1044,19 +1047,23 @@ static int mem_cgroup_move_parent(struct page_cgroup *pc,
 
 	ret = mem_cgroup_move_account(pc, child, parent);
 
-	/* drop extra refcnt by try_charge() (move_account increment one) */
-	css_put(&parent->css);
 	putback_lru_page(page);
 	if (!ret) {
 		put_page(page);
+		/* drop extra refcnt by try_charge() */
+		css_put(&parent->css);
 		return 0;
 	}
-	/* uncharge if move fails */
+
 cancel:
+	put_page(page);
+uncharge:
+	/* drop extra refcnt by try_charge() */
+	css_put(&parent->css);
+	/* uncharge if move fails */
 	res_counter_uncharge(&parent->res, PAGE_SIZE);
 	if (do_swap_account)
 		res_counter_uncharge(&parent->memsw, PAGE_SIZE);
-	put_page(page);
 	return ret;
 }