gpu: nvgpu: gk20a: Use spin_lock for jobs_lock

This is done to boost performance of the GPU submit time, which
is critical for compute use-cases.

Bug 200215465
Bug 1804898

Conflicts:
	drivers/gpu/nvgpu/gk20a/channel_gk20a.c

Change-Id: Ic4884ee4eac910b92b84a47fdc1b2e9f26b2f1f0
Signed-off-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-on: http://git-master/r/1199860
Reviewed-on: http://git-master/r/1209834
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
index f5b68e72..6f8c160c 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
@@ -1125,9 +1125,9 @@ __releases(&cde_app->mutex)
         struct gk20a_cde_app *cde_app = &g->cde_app;
         bool channel_idle;
 
-        mutex_lock(&ch->jobs_lock);
+        spin_lock(&ch->jobs_lock);
         channel_idle = list_empty(&ch->jobs);
-        mutex_unlock(&ch->jobs_lock);
+        spin_unlock(&ch->jobs_lock);
 
         if (!channel_idle)
                 return;