task_epc is assigned first, so it does not need to initialize the 
assignment.

Signed-off-by: Li zeming <zeming@nfschina.com>
---
 kernel/events/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index f0128c5ff278..5e1a4cbdb67d 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4283,7 +4283,7 @@ ctx_event_to_rotate(struct perf_event_pmu_context *pmu_ctx)
 static bool perf_rotate_context(struct perf_cpu_pmu_context *cpc)
 {
 	struct perf_cpu_context *cpuctx = this_cpu_ptr(&perf_cpu_context);
-	struct perf_event_pmu_context *cpu_epc, *task_epc = NULL;
+	struct perf_event_pmu_context *cpu_epc, *task_epc;
 	struct perf_event *cpu_event = NULL, *task_event = NULL;
 	int cpu_rotate, task_rotate;
 	struct pmu *pmu;
-- 
2.18.2