drm/ttm: remove superflous extern attribute from funcs

Extern is the default attribute for functions anyway.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/390972/

include/drm/ttm/ttm_execbuf_util.h

@@ -58,8 +58,7 @@ struct ttm_validate_buffer {
  * Undoes all buffer validation reservations for bos pointed to by
  * the list entries.
  */
-
-extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
+void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
 				struct list_head *list);
 
 /**
@@ -96,8 +95,7 @@ extern void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
  * ttm_eu_fence_buffer_objects() when command submission is complete or
  * has failed.
  */
-
-extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
+int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
 			   struct list_head *list, bool intr,
 			   struct list_head *dups);
 
@@ -113,8 +111,7 @@ extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
  * It also unreserves all buffers, putting them on lru lists.
  *
  */
-
-extern void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
+void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
 				 struct list_head *list,
 				 struct dma_fence *fence);
 

include/drm/ttm/ttm_memory.h

@@ -79,18 +79,17 @@ extern struct ttm_mem_global {
 #endif
 } ttm_mem_glob;
 
-extern int ttm_mem_global_init(struct ttm_mem_global *glob);
-extern void ttm_mem_global_release(struct ttm_mem_global *glob);
-extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
+int ttm_mem_global_init(struct ttm_mem_global *glob);
+void ttm_mem_global_release(struct ttm_mem_global *glob);
+int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
 			 struct ttm_operation_ctx *ctx);
-extern void ttm_mem_global_free(struct ttm_mem_global *glob,
-				uint64_t amount);
-extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
+void ttm_mem_global_free(struct ttm_mem_global *glob, uint64_t amount);
+int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
 			      struct page *page, uint64_t size,
 			      struct ttm_operation_ctx *ctx);
-extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
+void ttm_mem_global_free_page(struct ttm_mem_global *glob,
 			      struct page *page, uint64_t size);
-extern size_t ttm_round_pot(size_t size);
-extern bool ttm_check_under_lowerlimit(struct ttm_mem_global *glob,
-			uint64_t num_pages, struct ttm_operation_ctx *ctx);
+size_t ttm_round_pot(size_t size);
+bool ttm_check_under_lowerlimit(struct ttm_mem_global *glob, uint64_t num_pages,
+				struct ttm_operation_ctx *ctx);
 #endif