[8/9] drm/msm: Removed unused struct_mutex_task

Commit Message

Jordan Crouse Oct. 20, 2017, 5:07 p.m. UTC

Recent changes to locking have rendered struct_mutex_task
unused.

Signed-off-by: Jordan Crouse <[e-mail]>
---
 drivers/gpu/drm/msm/msm_drv.h        | 6 ------
 drivers/gpu/drm/msm/msm_gem_submit.c | 2 --
 2 files changed, 8 deletions(-)

Patch

diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 9853e3e..c46dc12 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -154,12 +154,6 @@  struct msm_drm_private {
 	struct shrinker shrinker;
 
 	struct msm_vblank_ctrl vblank_ctrl;
-
-	/* task holding struct_mutex.. currently only used in submit path
-	 * to detect and reject faults from copy_from_user() for submit
-	 * ioctl.
-	 */
-	struct task_struct *struct_mutex_task;
 };
 
 struct msm_format {
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 9e087cf..d68bfa6 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -449,7 +449,6 @@  int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 			goto out_unlock;
 		}
 	}
-	priv->struct_mutex_task = current;
 
 	submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds);
 	if (!submit) {
@@ -569,7 +568,6 @@  int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 out_unlock:
 	if (ret && (out_fence_fd >= 0))
 		put_unused_fd(out_fence_fd);
-	priv->struct_mutex_task = NULL;
 	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }