[tip: sched/fifo] sched,msm: Convert to sched_set_fifo*()

[tip-bot2 for Peter Zijlstra]

The following commit has been merged into the sched/fifo branch of tip:

Commit-ID:     64419ca67622974f46bf053a7e745d2d0d1c43ef
Gitweb:        
https://git.kernel.org/tip/64419ca67622974f46bf053a7e745d2d0d1c43ef
Author:        Peter Zijlstra <pet...@infradead.org>
AuthorDate:    Tue, 21 Apr 2020 12:09:13 +02:00
Committer:     Peter Zijlstra <pet...@infradead.org>
CommitterDate: Mon, 15 Jun 2020 14:10:21 +02:00

sched,msm: 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.

Use sched_set_fifo(); Effectively changes prio from 16 to 50.

Cc: airl...@redhat.com
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Reviewed-by: Ingo Molnar <mi...@kernel.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index f6ce40b..89a8b9c 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -389,7 +389,6 @@ static int msm_drm_init(struct device *dev, struct 
drm_driver *drv)
        struct msm_kms *kms;
        struct msm_mdss *mdss;
        int ret, i;
-       struct sched_param param;
 
        ddev = drm_dev_alloc(drv, dev);
        if (IS_ERR(ddev)) {
@@ -495,12 +494,6 @@ static int msm_drm_init(struct device *dev, struct 
drm_driver *drv)
        ddev->mode_config.funcs = &mode_config_funcs;
        ddev->mode_config.helper_private = &mode_config_helper_funcs;
 
-       /**
-        * this priority was found during empiric testing to have appropriate
-        * realtime scheduling to process display updates and interact with
-        * other real time and normal priority task
-        */
-       param.sched_priority = 16;
        for (i = 0; i < priv->num_crtcs; i++) {
                /* initialize event thread */
                priv->event_thread[i].crtc_id = priv->crtcs[i]->base.id;
@@ -516,8 +509,7 @@ static int msm_drm_init(struct device *dev, struct 
drm_driver *drv)
                        goto err_msm_uninit;
                }
 
-               ret = sched_setscheduler(priv->event_thread[i].thread,
-                                        SCHED_FIFO, &param);
+               ret = sched_set_fifo(priv->event_thread[i].thread);
                if (ret)
                        dev_warn(dev, "event_thread set priority failed:%d\n",
                                 ret);