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>
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index dd47b2a..0e3754a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1716,40 +1716,12 @@
}
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);
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index e929c27..6b9db91 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -789,34 +789,6 @@
extern int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo,
bool interruptible);
-/**
- * ttm_bo_block_reservation
- *
- * @bo: A pointer to a struct ttm_buffer_object.
- * @interruptible: Use interruptible sleep when waiting.
- * @no_wait: Don't sleep, but rather return -EBUSY.
- *
- * Block reservation for validation by simply reserving the buffer.
- * This is intended for single buffer use only without eviction,
- * and thus needs no deadlock protection.
- *
- * Returns:
- * -EBUSY: If no_wait == 1 and the buffer is already reserved.
- * -ERESTARTSYS: If interruptible == 1 and the process received a signal
- * while sleeping.
- */
-extern int ttm_bo_block_reservation(struct ttm_buffer_object *bo,
- bool interruptible, bool no_wait);
-
-/**
- * ttm_bo_unblock_reservation
- *
- * @bo: A pointer to a struct ttm_buffer_object.
- *
- * Unblocks reservation leaving lru lists untouched.
- */
-extern void ttm_bo_unblock_reservation(struct ttm_buffer_object *bo);
-
/*
* ttm_bo_util.c
*/