[PATCH] mm/mempolicy: return NULL if node is NUMA_NO_NODE in get_task_policy

[Jianguo Wu]

If node == NUMA_NO_NODE, pol is NULL, we should return NULL instead of
do "if (!pol->mode)" check.

Signed-off-by: Jianguo Wu <wujianguo@xxxxxxxxxx>
---
 mm/mempolicy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 4baf12e..e0e3398 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -129,6 +129,8 @@ static struct mempolicy *get_task_policy(struct task_struct *p)
 		node = numa_node_id();
 		if (node != NUMA_NO_NODE)
 			pol = &preferred_node_policy[node];
+		else
+			return NULL;
 
 		/* preferred_node_policy is not initialised early in boot */
 		if (!pol->mode)
-- 
1.8.2.2



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