drm/ttm: Remove the ttm_bo_block_reservation() function.

It's unused and buggy in its current form, since it can place a bo
in the reserved state without removing it from lru lists.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 29 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index dd47b2a9a791..0e3754a3a303 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1716,40 +1716,12 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
 }
 EXPORT_SYMBOL(ttm_bo_wait);
 
-void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo)
-{
-        atomic_set(&bo->reserved, 0);
-        wake_up_all(&bo->event_queue);
-}
-
-int ttm_bo_block_reservation(struct ttm_buffer_object *bo, bool interruptible,
-                             bool no_wait)
-{
-        int ret;
-
-        while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
-                if (no_wait)
-                        return -EBUSY;
-                else if (interruptible) {
-                        ret = wait_event_interruptible
-                            (bo->event_queue, atomic_read(&bo->reserved) == 0);
-                        if (unlikely(ret != 0))
-                                return ret;
-                } else {
-                        wait_event(bo->event_queue,
-                                   atomic_read(&bo->reserved) == 0);
-                }
-        }
-        return 0;
-}
-
 int ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait)
 {
         int ret = 0;
 
         /*
-         * Using ttm_bo_reserve instead of ttm_bo_block_reservation
-         * makes sure the lru lists are updated.
+         * Using ttm_bo_reserve makes sure the lru lists are updated.
          */
 
         ret = ttm_bo_reserve(bo, true, no_wait, false, 0);