path: root/common/recipes-kernel/linux/linux-yocto-4.14.71/3603-drm-ttm-drop-ttm-dummy_read_page.patch

From df190e632b8ceb70d03cc30d69892763e5df3071 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Wed, 21 Feb 2018 20:34:13 +0100
Subject: [PATCH 3603/4131] drm/ttm: drop ttm->dummy_read_page
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

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>
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c     |  5 ++---
 drivers/gpu/drm/ast/ast_ttm.c               |  5 ++---
 drivers/gpu/drm/bochs/bochs_mm.c            |  5 ++---
 drivers/gpu/drm/cirrus/cirrus_ttm.c         |  5 ++---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c |  5 ++---
 drivers/gpu/drm/mgag200/mgag200_ttm.c       |  5 ++---
 drivers/gpu/drm/nouveau/nouveau_bo.c        |  6 +++---
 drivers/gpu/drm/nouveau/nouveau_sgdma.c     |  5 ++---
 drivers/gpu/drm/nouveau/nouveau_ttm.h       |  3 +--
 drivers/gpu/drm/qxl/qxl_ttm.c               |  6 ++----
 drivers/gpu/drm/radeon/radeon_ttm.c         |  7 +++----
 drivers/gpu/drm/ttm/ttm_agp_backend.c       |  8 ++++----
 drivers/gpu/drm/ttm/ttm_bo.c                |  6 ++----
 drivers/gpu/drm/ttm/ttm_tt.c                |  8 ++------
 drivers/gpu/drm/virtio/virtgpu_ttm.c        |  6 ++----
 drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c      |  9 +++------
 include/drm/ttm/ttm_bo_driver.h             | 21 ++++++++-------------
 17 files changed, 44 insertions(+), 71 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 8412f6d..36a3d7e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1043,8 +1043,7 @@ static struct ttm_backend_func amdgpu_backend_func = {
 };
 
 static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_bo_device *bdev,
-				    unsigned long size, uint32_t page_flags,
-				    struct page *dummy_read_page)
+				    unsigned long size, uint32_t page_flags)
 {
 	struct amdgpu_device *adev;
 	struct amdgpu_ttm_tt *gtt;
@@ -1057,7 +1056,7 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_bo_device *bdev,
 	}
 	gtt->ttm.ttm.func = &amdgpu_backend_func;
 	gtt->adev = adev;
-	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags)) {
 		kfree(gtt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c
index 696a15d..9c0c44b 100644
--- a/drivers/gpu/drm/ast/ast_ttm.c
+++ b/drivers/gpu/drm/ast/ast_ttm.c
@@ -200,8 +200,7 @@ static struct ttm_backend_func ast_tt_backend_func = {
 
 
 static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
-				 unsigned long size, uint32_t page_flags,
-				 struct page *dummy_read_page)
+				 unsigned long size, uint32_t page_flags)
 {
 	struct ttm_tt *tt;
 
@@ -209,7 +208,7 @@ static struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
 	if (tt == NULL)
 		return NULL;
 	tt->func = &ast_tt_backend_func;
-	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_tt_init(tt, bdev, size, page_flags)) {
 		kfree(tt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
index c4cadb6..7b48dda 100644
--- a/drivers/gpu/drm/bochs/bochs_mm.c
+++ b/drivers/gpu/drm/bochs/bochs_mm.c
@@ -178,8 +178,7 @@ static struct ttm_backend_func bochs_tt_backend_func = {
 
 static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev,
 					  unsigned long size,
-					  uint32_t page_flags,
-					  struct page *dummy_read_page)
+					  uint32_t page_flags)
 {
 	struct ttm_tt *tt;
 
@@ -187,7 +186,7 @@ static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev,
 	if (tt == NULL)
 		return NULL;
 	tt->func = &bochs_tt_backend_func;
-	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_tt_init(tt, bdev, size, page_flags)) {
 		kfree(tt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c
index 1ff1838..1546efb 100644
--- a/drivers/gpu/drm/cirrus/cirrus_ttm.c
+++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c
@@ -200,8 +200,7 @@ static struct ttm_backend_func cirrus_tt_backend_func = {
 
 
 static struct ttm_tt *cirrus_ttm_tt_create(struct ttm_bo_device *bdev,
-				 unsigned long size, uint32_t page_flags,
-				 struct page *dummy_read_page)
+				 unsigned long size, uint32_t page_flags)
 {
 	struct ttm_tt *tt;
 
@@ -209,7 +208,7 @@ static struct ttm_tt *cirrus_ttm_tt_create(struct ttm_bo_device *bdev,
 	if (tt == NULL)
 		return NULL;
 	tt->func = &cirrus_tt_backend_func;
-	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_tt_init(tt, bdev, size, page_flags)) {
 		kfree(tt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
index 3518167..8cf4f3c 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
@@ -202,8 +202,7 @@ static struct ttm_backend_func hibmc_tt_backend_func = {
 
 static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_bo_device *bdev,
 					  unsigned long size,
-					  u32 page_flags,
-					  struct page *dummy_read_page)
+					  u32 page_flags)
 {
 	struct ttm_tt *tt;
 	int ret;
@@ -214,7 +213,7 @@ static struct ttm_tt *hibmc_ttm_tt_create(struct ttm_bo_device *bdev,
 		return NULL;
 	}
 	tt->func = &hibmc_tt_backend_func;
-	ret = ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page);
+	ret = ttm_tt_init(tt, bdev, size, page_flags);
 	if (ret) {
 		DRM_ERROR("failed to initialize ttm_tt: %d\n", ret);
 		kfree(tt);
diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
index 3e7e1cd..54703b9 100644
--- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
+++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
@@ -200,8 +200,7 @@ static struct ttm_backend_func mgag200_tt_backend_func = {
 
 
 static struct ttm_tt *mgag200_ttm_tt_create(struct ttm_bo_device *bdev,
-				 unsigned long size, uint32_t page_flags,
-				 struct page *dummy_read_page)
+				 unsigned long size, uint32_t page_flags)
 {
 	struct ttm_tt *tt;
 
@@ -209,7 +208,7 @@ static struct ttm_tt *mgag200_ttm_tt_create(struct ttm_bo_device *bdev,
 	if (tt == NULL)
 		return NULL;
 	tt->func = &mgag200_tt_backend_func;
-	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_tt_init(tt, bdev, size, page_flags)) {
 		kfree(tt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index e427f80..77c9571 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -542,18 +542,18 @@ nouveau_bo_wr32(struct nouveau_bo *nvbo, unsigned index, u32 val)
 
 static struct ttm_tt *
 nouveau_ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
-		      uint32_t page_flags, struct page *dummy_read)
+		      uint32_t page_flags)
 {
 #if IS_ENABLED(CONFIG_AGP)
 	struct nouveau_drm *drm = nouveau_bdev(bdev);
 
 	if (drm->agp.bridge) {
 		return ttm_agp_tt_create(bdev, drm->agp.bridge, size,
-					 page_flags, dummy_read);
+					 page_flags);
 	}
 #endif
 
-	return nouveau_sgdma_create_ttm(bdev, size, page_flags, dummy_read);
+	return nouveau_sgdma_create_ttm(bdev, size, page_flags);
 }
 
 static int
diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
index fde11ce..99511b6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
@@ -91,8 +91,7 @@ static struct ttm_backend_func nv50_sgdma_backend = {
 
 struct ttm_tt *
 nouveau_sgdma_create_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)
 {
 	struct nouveau_drm *drm = nouveau_bdev(bdev);
 	struct nouveau_sgdma_be *nvbe;
@@ -106,7 +105,7 @@ nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
 	else
 		nvbe->ttm.ttm.func = &nv50_sgdma_backend;
 
-	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
+	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags))
 		/*
 		 * A failing ttm_dma_tt_init() will call ttm_tt_destroy()
 		 * and thus our nouveau_sgdma_destroy() hook, so we don't need
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.h b/drivers/gpu/drm/nouveau/nouveau_ttm.h
index 96082b6..64e484e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.h
@@ -13,8 +13,7 @@ extern const struct ttm_mem_type_manager_func nouveau_gart_manager;
 extern const struct ttm_mem_type_manager_func nv04_gart_manager;
 
 struct ttm_tt *nouveau_sgdma_create_ttm(struct ttm_bo_device *,
-					unsigned long size, u32 page_flags,
-					struct page *dummy_read_page);
+					unsigned long size, u32 page_flags);
 
 int  nouveau_ttm_init(struct nouveau_drm *drm);
 void nouveau_ttm_fini(struct nouveau_drm *drm);
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index 7ecf8a4..955cd45 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -314,8 +314,7 @@ static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm)
 }
 
 static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
-					unsigned long size, uint32_t page_flags,
-					struct page *dummy_read_page)
+					unsigned long size, uint32_t page_flags)
 {
 	struct qxl_device *qdev;
 	struct qxl_ttm_tt *gtt;
@@ -326,8 +325,7 @@ static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
 		return NULL;
 	gtt->ttm.ttm.func = &qxl_backend_func;
 	gtt->qdev = qdev;
-	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
-			    dummy_read_page)) {
+	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags)) {
 		kfree(gtt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 8032da5..7bc0b61 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -687,8 +687,7 @@ static struct ttm_backend_func radeon_backend_func = {
 };
 
 static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
-				    unsigned long size, uint32_t page_flags,
-				    struct page *dummy_read_page)
+				    unsigned long size, uint32_t page_flags)
 {
 	struct radeon_device *rdev;
 	struct radeon_ttm_tt *gtt;
@@ -697,7 +696,7 @@ static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
 #if IS_ENABLED(CONFIG_AGP)
 	if (rdev->flags & RADEON_IS_AGP) {
 		return ttm_agp_tt_create(bdev, rdev->ddev->agp->bridge,
-					 size, page_flags, dummy_read_page);
+					 size, page_flags);
 	}
 #endif
 
@@ -707,7 +706,7 @@ static struct ttm_tt *radeon_ttm_tt_create(struct ttm_bo_device *bdev,
 	}
 	gtt->ttm.ttm.func = &radeon_backend_func;
 	gtt->rdev = rdev;
-	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags)) {
 		kfree(gtt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
index 028ab60..cfd1931 100644
--- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
+++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
@@ -50,6 +50,7 @@ struct ttm_agp_backend {
 static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 {
 	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
+	struct page *dummy_read_page = ttm->bdev->glob->dummy_read_page;
 	struct drm_mm_node *node = bo_mem->mm_node;
 	struct agp_memory *mem;
 	int ret, cached = (bo_mem->placement & TTM_PL_FLAG_CACHED);
@@ -64,7 +65,7 @@ static int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_mem_reg *bo_mem)
 		struct page *page = ttm->pages[i];
 
 		if (!page)
-			page = ttm->dummy_read_page;
+			page = dummy_read_page;
 
 		mem->pages[mem->page_count++] = page;
 	}
@@ -111,8 +112,7 @@ static struct ttm_backend_func ttm_agp_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)
 {
 	struct ttm_agp_backend *agp_be;
 
@@ -124,7 +124,7 @@ struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
 	agp_be->bridge = bridge;
 	agp_be->ttm.func = &ttm_agp_func;
 
-	if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags, dummy_read_page)) {
+	if (ttm_tt_init(&agp_be->ttm, bdev, size, page_flags)) {
 		kfree(agp_be);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 68eed68..0e9b255 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -230,7 +230,6 @@ EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
 static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
 {
 	struct ttm_bo_device *bdev = bo->bdev;
-	struct ttm_bo_global *glob = bo->glob;
 	int ret = 0;
 	uint32_t page_flags = 0;
 
@@ -246,14 +245,13 @@ static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
 			page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
 	case ttm_bo_type_kernel:
 		bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
-						      page_flags, glob->dummy_read_page);
+						      page_flags);
 		if (unlikely(bo->ttm == NULL))
 			ret = -ENOMEM;
 		break;
 	case ttm_bo_type_sg:
 		bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
-						      page_flags | TTM_PAGE_FLAG_SG,
-						      glob->dummy_read_page);
+						      page_flags | TTM_PAGE_FLAG_SG);
 		if (unlikely(bo->ttm == NULL)) {
 			ret = -ENOMEM;
 			break;
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 8ebc8d3..52ef502 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -185,15 +185,13 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
 }
 
 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)
 {
 	ttm->bdev = bdev;
 	ttm->glob = bdev->glob;
 	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	ttm->caching_state = tt_cached;
 	ttm->page_flags = page_flags;
-	ttm->dummy_read_page = dummy_read_page;
 	ttm->state = tt_unpopulated;
 	ttm->swap_storage = NULL;
 
@@ -215,8 +213,7 @@ void ttm_tt_fini(struct ttm_tt *ttm)
 EXPORT_SYMBOL(ttm_tt_fini);
 
 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)
 {
 	struct ttm_tt *ttm = &ttm_dma->ttm;
 
@@ -225,7 +222,6 @@ int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
 	ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	ttm->caching_state = tt_cached;
 	ttm->page_flags = page_flags;
-	ttm->dummy_read_page = dummy_read_page;
 	ttm->state = tt_unpopulated;
 	ttm->swap_storage = NULL;
 
diff --git a/drivers/gpu/drm/virtio/virtgpu_ttm.c b/drivers/gpu/drm/virtio/virtgpu_ttm.c
index cd389c5..f94becd 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ttm.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ttm.c
@@ -339,8 +339,7 @@ static void virtio_gpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
 
 static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_bo_device *bdev,
 					       unsigned long size,
-					       uint32_t page_flags,
-					       struct page *dummy_read_page)
+					       uint32_t page_flags)
 {
 	struct virtio_gpu_device *vgdev;
 	struct virtio_gpu_ttm_tt *gtt;
@@ -351,8 +350,7 @@ static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_bo_device *bdev,
 		return NULL;
 	gtt->ttm.ttm.func = &virtio_gpu_backend_func;
 	gtt->vgdev = vgdev;
-	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
-			    dummy_read_page)) {
+	if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags)) {
 		kfree(gtt);
 		return NULL;
 	}
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
index c705632..c762686 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -690,8 +690,7 @@ static struct ttm_backend_func vmw_ttm_func = {
 };
 
 static struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
-				 unsigned long size, uint32_t page_flags,
-				 struct page *dummy_read_page)
+				 unsigned long size, uint32_t page_flags)
 {
 	struct vmw_ttm_tt *vmw_be;
 	int ret;
@@ -705,11 +704,9 @@ static struct ttm_tt *vmw_ttm_tt_create(struct ttm_bo_device *bdev,
 	vmw_be->mob = NULL;
 
 	if (vmw_be->dev_priv->map_mode == vmw_dma_alloc_coherent)
-		ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bdev, size, page_flags,
-				      dummy_read_page);
+		ret = ttm_dma_tt_init(&vmw_be->dma_ttm, bdev, size, page_flags);
 	else
-		ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bdev, size, page_flags,
-				  dummy_read_page);
+		ret = ttm_tt_init(&vmw_be->dma_ttm.ttm, bdev, size, page_flags);
 	if (unlikely(ret != 0))
 		goto out_no_init;
 
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index b980ed8..0a3b1bf 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -338,11 +338,9 @@ struct ttm_bo_driver {
 	 * Returns:
 	 * NULL: Out of memory.
 	 */
-	struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
-					unsigned long size,
-					uint32_t page_flags,
-					struct page *dummy_read_page);
-
+        struct ttm_tt *(*ttm_tt_create)(struct ttm_bo_device *bdev,
+                                        unsigned long size,
+                                        uint32_t page_flags);
 	/**
 	 * ttm_tt_populate
 	 *
@@ -630,11 +628,9 @@ ttm_flag_masked(uint32_t *old, uint32_t new, uint32_t mask)
  * NULL: Out of memory.
  */
 extern 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);
 extern 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
@@ -1110,10 +1106,9 @@ extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
  * for TT memory. This function uses the linux agpgart interface to
  * bind and unbind memory backing a ttm_tt.
  */
-extern 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);
+struct ttm_tt *ttm_agp_tt_create(struct ttm_bo_device *bdev,
+                                 struct agp_bridge_data *bridge,
+                                 unsigned long size, uint32_t page_flags);
 int ttm_agp_tt_populate(struct ttm_tt *ttm);
 void ttm_agp_tt_unpopulate(struct ttm_tt *ttm);
 #endif
-- 
2.7.4