1 files changed, 1 insertions, 6 deletions

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 4deefaace90e..68fbf4ff6888 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -3493,15 +3493,10 @@ static void perf_event_mmap_ctx(struct perf_event_context *ctx,
 {
         struct perf_event *event;
 
-        if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
-                return;
-
-        rcu_read_lock();
         list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
                 if (perf_event_mmap_match(event, mmap_event))
                         perf_event_mmap_output(event, mmap_event);
         }
-        rcu_read_unlock();
 }
 
 static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
@@ -3557,11 +3552,11 @@ got_name:
 
         mmap_event->event_id.header.size = sizeof(mmap_event->event_id) + size;
 
+        rcu_read_lock();
         cpuctx = &get_cpu_var(perf_cpu_context);
         perf_event_mmap_ctx(&cpuctx->ctx, mmap_event);
         put_cpu_var(perf_cpu_context);
 
-        rcu_read_lock();
         /*
          * doesn't really matter which of the child contexts the
          * events ends up in.