[PATCH 03/30] staging: sync: Add timestamps to sync_pts

[John Stultz]

From: Erik Gilling <konk...@android.com>

Add ktime timestamps to sync_pt structure and
update them when signaled

Cc: Maarten Lankhorst <maarten.lankhorst at canonical.com>
Cc: Erik Gilling <konkers at android.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Cc: Rob Clark <robclark at gmail.com>
Cc: Sumit Semwal <sumit.semwal at linaro.org>
Cc: Greg KH <gregkh at linuxfoundation.org>
Cc: dri-devel at lists.freedesktop.org
Cc: Android Kernel Team <kernel-team at android.com>
Signed-off-by: Erik Gilling <konkers at android.com>
[jstultz: Added commit message]
Signed-off-by: John Stultz <john.stultz at linaro.org>
---
 drivers/staging/android/sync.c |    5 +++++
 drivers/staging/android/sync.h |    5 +++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index 4a9e63d..88d7e66 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -155,12 +155,17 @@ void sync_pt_free(struct sync_pt *pt)
 /* call with pt->parent->active_list_lock held */
 static int _sync_pt_has_signaled(struct sync_pt *pt)
 {
+       int old_status = pt->status;
+
        if (!pt->status)
                pt->status = pt->parent->ops->has_signaled(pt);

        if (!pt->status && pt->parent->destroyed)
                pt->status = -ENOENT;

+       if (pt->status != old_status)
+               pt->timestamp = ktime_get();
+
        return pt->status;
 }

diff --git a/drivers/staging/android/sync.h b/drivers/staging/android/sync.h
index 388acd1..a8e289d 100644
--- a/drivers/staging/android/sync.h
+++ b/drivers/staging/android/sync.h
@@ -16,6 +16,7 @@
 #include <linux/types.h>
 #ifdef __KERNEL__

+#include <linux/ktime.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/wait.h>
@@ -90,6 +91,8 @@ struct sync_timeline {
  * @fence:             sync_fence to which the sync_pt belongs
  * @pt_list:           membership in sync_fence.pt_list_head
  * @status:            1: signaled, 0:active, <0: error
+ * @timestamp:         time which sync_pt status transitioned from active to
+ *                       singaled or error.
  */
 struct sync_pt {
        struct sync_timeline            *parent;
@@ -102,6 +105,8 @@ struct sync_pt {

        /* protected by parent->active_list_lock */
        int                     status;
+
+       ktime_t                 timestamp;
 };

 /**
-- 
1.7.10.4