perf: Fix irq_work 'tail' recursion
[pandora-kernel.git] / kernel / events / core.c
index 2a4bf43..4277095 100644 (file)
@@ -3956,6 +3956,13 @@ static void perf_pending_event(struct irq_work *entry)
 {
        struct perf_event *event = container_of(entry,
                        struct perf_event, pending);
+       int rctx;
+
+       rctx = perf_swevent_get_recursion_context();
+       /*
+        * If we 'fail' here, that's OK, it means recursion is already disabled
+        * and we won't recurse 'further'.
+        */
 
        if (event->pending_disable) {
                event->pending_disable = 0;
@@ -3966,6 +3973,9 @@ static void perf_pending_event(struct irq_work *entry)
                event->pending_wakeup = 0;
                perf_event_wakeup(event);
        }
+
+       if (rctx >= 0)
+               perf_swevent_put_recursion_context(rctx);
 }
 
 /*