sched,drm/scheduler: Convert to sched_set_fifo*()

Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.

In this case, use fifo_low, because it only cares about being above
SCHED_NORMAL. Effectively no change in behaviour.

Cc: alexander.deucher@amd.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 2f319102ae9f7f39366f54a6ccfe52812af8e9b9..17cf77e2c4e51c69bf28a47207863aa7de8b1439 100644 (file)
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -760,11 +760,10 @@ static bool drm_sched_blocked(struct drm_gpu_scheduler *sched)
  */
 static int drm_sched_main(void *param)
 {
-       struct sched_param sparam = {.sched_priority = 1};
        struct drm_gpu_scheduler *sched = (struct drm_gpu_scheduler *)param;
        int r;
 
-       sched_setscheduler(current, SCHED_FIFO, &sparam);
+       sched_set_fifo_low(current);
 
        while (!kthread_should_stop()) {
                struct drm_sched_entity *entity = NULL;