drm/ttm: remove io_reserve_fastpath flag

Just use the use_io_reserve_lru flag. It doesn't make much
sense to have two flags.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/378238/

drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -675,7 +675,6 @@ nouveau_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 			}
 
 			man->func = &nouveau_vram_manager;
-			man->io_reserve_fastpath = false;
 			man->use_io_reserve_lru = true;
 		} else {
 			man->func = &ttm_bo_manager_func;

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1521,7 +1521,6 @@ int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type,
 	BUG_ON(type >= TTM_NUM_MEM_TYPES);
 	man = &bdev->man[type];
 	BUG_ON(man->has_type);
-	man->io_reserve_fastpath = true;
 	man->use_io_reserve_lru = false;
 	mutex_init(&man->io_reserve_mutex);
 	spin_lock_init(&man->move_lock);

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -93,7 +93,7 @@ EXPORT_SYMBOL(ttm_bo_move_ttm);
 
 int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
 {
-	if (likely(man->io_reserve_fastpath))
+	if (likely(!man->use_io_reserve_lru))
 		return 0;
 
 	if (interruptible)
@@ -105,7 +105,7 @@ int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
 
 void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
 {
-	if (likely(man->io_reserve_fastpath))
+	if (likely(!man->use_io_reserve_lru))
 		return;
 
 	mutex_unlock(&man->io_reserve_mutex);
@@ -136,7 +136,7 @@ int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
 
 	if (!bdev->driver->io_mem_reserve)
 		return 0;
-	if (likely(man->io_reserve_fastpath))
+	if (likely(!man->use_io_reserve_lru))
 		return bdev->driver->io_mem_reserve(bdev, mem);
 
 	if (bdev->driver->io_mem_reserve &&
@@ -157,7 +157,7 @@ void ttm_mem_io_free(struct ttm_bo_device *bdev,
 {
 	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 
-	if (likely(man->io_reserve_fastpath))
+	if (likely(!man->use_io_reserve_lru))
 		return;
 
 	if (bdev->driver->io_mem_reserve &&

include/drm/ttm/ttm_bo_driver.h

@@ -155,7 +155,6 @@ struct ttm_mem_type_manager_func {
  * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions
  * reserved by the TTM vm system.
  * @io_reserve_lru: Optional lru list for unreserving io mem regions.
- * @io_reserve_fastpath: Only use bdev::driver::io_mem_reserve to obtain
  * @move_lock: lock for move fence
  * static information. bdev::driver::io_mem_free is never used.
  * @lru: The lru list for this memory type.
@@ -184,7 +183,6 @@ struct ttm_mem_type_manager {
 	void *priv;
 	struct mutex io_reserve_mutex;
 	bool use_io_reserve_lru;
-	bool io_reserve_fastpath;
 	spinlock_t move_lock;
 
 	/*