[PATCH 14/16] memcg: fix sparse warning: Using plain integer as NULLpointer

[Hannes Eder]

Fix this sparse warning:
  mm/memcontrol.c:1637:32: warning: Using plain integer as NULL pointer

Signed-off-by: Hannes Eder <hannes@xxxxxxxxxxxxxx>
---
 mm/memcontrol.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8e4be9c..09d6650 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1634,7 +1634,7 @@ 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;
 		}

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