drm/ttm: drop ttm->dummy_read_page

Only used by the AGP backend and there it can be easily accessed using
ttm->bdev->glob.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 4 insertions, 13 deletions

diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 0e4ae26da093..b338dd0ea038 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -100,7 +100,6 @@ enum ttm_caching_state {
  * @bdev: Pointer to a struct ttm_bo_device.
  * @func: Pointer to a struct ttm_backend_func that describes
  * the backend methods.
- * @dummy_read_page: Page to map where the ttm_tt page array contains a NULL
  * pointer.
  * @pages: Array of pages backing the data.
  * @num_pages: Number of pages in the page array.
@@ -118,7 +117,6 @@ enum ttm_caching_state {
 struct ttm_tt {
         struct ttm_bo_device *bdev;
         struct ttm_backend_func *func;
-        struct page *dummy_read_page;
         struct page **pages;
         uint32_t page_flags;
         unsigned long num_pages;
@@ -331,7 +329,6 @@ struct ttm_bo_driver {
          * @bdev: pointer to a struct ttm_bo_device:
          * @size: Size of the data needed backing.
          * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
-         * @dummy_read_page: See struct ttm_bo_device.
          *
          * Create a struct ttm_tt to back data with system memory pages.
          * No pages are actually allocated.
@@ -340,8 +337,7 @@ struct ttm_bo_driver {
          */
         struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
                                         unsigned long size,
-                                        uint32_t page_flags,
-                                        struct page *dummy_read_page);
+                                        uint32_t page_flags);
 
         /**
          * ttm_tt_populate
@@ -621,7 +617,6 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
  * @bdev: pointer to a struct ttm_bo_device:
  * @size: Size of the data needed backing.
  * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
- * @dummy_read_page: See struct ttm_bo_device.
  *
  * Create a struct ttm_tt to back data with system memory pages.
  * No pages are actually allocated.
@@ -629,11 +624,9 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
  * NULL: Out of memory.
  */
 int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
-                unsigned long size, uint32_t page_flags,
-                struct page *dummy_read_page);
+                unsigned long size, uint32_t page_flags);
 int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
-                    unsigned long size, uint32_t page_flags,
-                    struct page *dummy_read_page);
+                    unsigned long size, uint32_t page_flags);
 
 /**
  * ttm_tt_fini
@@ -1080,7 +1073,6 @@ extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
  * @bridge: The agp bridge this device is sitting on.
  * @size: Size of the data needed backing.
  * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
- * @dummy_read_page: See struct ttm_bo_device.
  *
  *
  * Create a TTM backend that uses the indicated AGP bridge as an aperture
@@ -1089,8 +1081,7 @@ extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
  */
 struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
                                  struct agp_bridge_data *bridge,
-                                 unsigned long size, uint32_t page_flags,
-                                 struct page *dummy_read_page);
+                                 unsigned long size, uint32_t page_flags);
 int ttm_agp_tt_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
 void ttm_agp_tt_unpopulate(struct ttm_tt *ttm);
 #endif