[PATCH] sched: psi: Fix a GCC uninitialized warning

[zhong jiang]

I find the following warning when compiling the kernel.

kernel/sched/psi.c:639:13: warning: 'rq' may be used uninitialized in this 
function [-Wmaybe-uninitialized]
  struct rq *rq;

Signed-off-by: zhong jiang <zhongji...@huawei.com>
---
 kernel/sched/psi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 7cdecfc..2d8a1f2 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -636,7 +636,7 @@ void cgroup_move_task(struct task_struct *task, struct 
css_set *to)
        bool move_psi = !psi_disabled;
        unsigned int task_flags = 0;
        struct rq_flags rf;
-       struct rq *rq;
+       struct rq *rq = NULL;
 
        if (move_psi) {
                rq = task_rq_lock(task, &rf);
-- 
1.7.12.4