gpu: nvgpu: CPU timestamps for alarms

Use sched_clock() for alarm timestamps to return
number of nanoseconds since the system was started.

Jira DNVGPU-186

Change-Id: Ie16fe5442ea8a5213bf5401a3faedcce387b3d93
Reviewed-on: http://git-master/r/1259026
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
(cherry picked from commit 383601c4d006734e13f0bfa386381573c87209da)
Reviewed-on: http://git-master/r/1280888
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/clk/clk_arb.c b/drivers/gpu/nvgpu/clk/clk_arb.c
index b4ed373d..d6cbe137 100644
--- a/drivers/gpu/nvgpu/clk/clk_arb.c
+++ b/drivers/gpu/nvgpu/clk/clk_arb.c
@@ -1294,7 +1294,7 @@ static void nvgpu_clk_arb_queue_notification(struct gk20a *g,
 
         queue_index = (atomic_inc_return(&queue->tail)) % queue->size;
         /* get current timestamp */
-        timestamp = (u64) get_cycles();
+        timestamp = (u64) sched_clock();
 
         queue->notifications[queue_index].timestamp = timestamp;
         queue->notifications[queue_index].notification = alarm_mask;