Yea, I might need to give another thought to whether this  spinlock can actually be removed.

Andrey

On 05/15/2018 03:38 PM, Alex Deucher wrote:
On Tue, May 15, 2018 at 3:31 PM, Andrey Grodzovsky
<andrey.grodzov...@amd.com> wrote:
Signed-off-by: Andrey Grodzovsky <andrey.grodzov...@amd.com>
Please provide a better patch description.

Alex

---
  drivers/gpu/drm/scheduler/gpu_scheduler.c | 4 ----
  include/drm/gpu_scheduler.h               | 1 -
  2 files changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler.c 
b/drivers/gpu/drm/scheduler/gpu_scheduler.c
index 1f1dd70..2569a63 100644
--- a/drivers/gpu/drm/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/scheduler/gpu_scheduler.c
@@ -140,7 +140,6 @@ int drm_sched_entity_init(struct drm_gpu_scheduler *sched,
         entity->last_scheduled = NULL;

         spin_lock_init(&entity->rq_lock);
-       spin_lock_init(&entity->queue_lock);
         spsc_queue_init(&entity->job_queue);

         atomic_set(&entity->fence_seq, 0);
@@ -424,11 +423,8 @@ void drm_sched_entity_push_job(struct drm_sched_job 
*sched_job,

         trace_drm_sched_job(sched_job, entity);

-       spin_lock(&entity->queue_lock);
         first = spsc_queue_push(&entity->job_queue, &sched_job->queue_node);

-       spin_unlock(&entity->queue_lock);
-
         /* first job wakes up scheduler */
         if (first) {
                 /* Add the entity to the run queue */
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index 350a62c..683eb65 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -56,7 +56,6 @@ struct drm_sched_entity {
         spinlock_t                      rq_lock;
         struct drm_gpu_scheduler        *sched;

-       spinlock_t                      queue_lock;
         struct spsc_queue               job_queue;

         atomic_t                        fence_seq;
--
2.7.4

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