mm/memcontrol.c: fix "integer as NULL pointer" sparse warning

tfarina · torvalds · commit 648bcc771145 · 2010-03-06T11:26:26.000-08:00
mm/memcontrol.c:2548:32: warning: Using plain integer as NULL pointer

Signed-off-by: Thiago Farina &lt;tfransosi@gmail.com&gt;
Acked-by: Balbir Singh &lt;balbir@linux.vnet.ibm.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
@@ -2545,7 +2545,7 @@ static int mem_cgroup_force_empty_list(struct mem_cgroup *mem,
 		pc = list_entry(list->prev, struct page_cgroup, lru);
 		if (busy == pc) {
 			list_move(&pc->lru, list);
-			busy = 0;
+			busy = NULL;
 			spin_unlock_irqrestore(&zone->lru_lock, flags);
 			continue;
 		}

Original file line number	Diff line number	Diff line change
`@@ -2545,7 +2545,7 @@ static int mem_cgroup_force_empty_list(struct mem_cgroup *mem,`
`2545`	`2545`	`pc = list_entry(list->prev, struct page_cgroup, lru);`
`2546`	`2546`	`if (busy == pc) {`
`2547`	`2547`	`list_move(&pc->lru, list);`
`2548`		`- busy = 0;`
	`2548`	`+ busy = NULL;`
`2549`	`2549`	`spin_unlock_irqrestore(&zone->lru_lock, flags);`
`2550`	`2550`	`continue;`
`2551`	`2551`	`}`