drm: add per-event vblank event trace points

Allows us to track each process that requests and completes events.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index c1b987158df..8364a705f12 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -403,6 +403,8 @@ struct drm_pending_event {
         struct drm_event *event;
         struct list_head link;
         struct drm_file *file_priv;
+        pid_t pid; /* pid of requester, no guarantee it's valid by the time
+                      we deliver the event, for tracing only */
         void (*destroy)(struct drm_pending_event *event);
 };