diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index f62e5398e620..77c2da886f5b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -75,10 +75,10 @@ static void amdgpu_ttm_backend_unbind(struct ttm_device *bdev,
 
 static int amdgpu_ttm_init_on_chip(struct amdgpu_device *adev,
 				    unsigned int type,
-				    uint64_t size_in_page)
+				    uint64_t size)
 {
 	return ttm_range_man_init(&adev->mman.bdev, type,
-				  false, size_in_page);
+				  false, size << PAGE_SHIFT);
 }
 
 /**
diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index d40b3edb52d0..f70d11e1cd47 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -999,7 +999,7 @@ static int drm_vram_mm_init(struct drm_vram_mm *vmm, struct drm_device *dev,
 		return ret;
 
 	ret = ttm_range_man_init(&vmm->bdev, TTM_PL_VRAM,
-				 false, vram_size >> PAGE_SHIFT);
+				 false, vram_size);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 67075c85f847..78dd6a87fb65 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -70,13 +70,13 @@ struct radeon_device *radeon_get_rdev(struct ttm_device *bdev)
 static int radeon_ttm_init_vram(struct radeon_device *rdev)
 {
 	return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_VRAM,
-				  false, rdev->mc.real_vram_size >> PAGE_SHIFT);
+				  false, rdev->mc.real_vram_size);
 }
 
 static int radeon_ttm_init_gtt(struct radeon_device *rdev)
 {
 	return ttm_range_man_init(&rdev->mman.bdev, TTM_PL_TT,
-				  true, rdev->mc.gtt_size >> PAGE_SHIFT);
+				  true, rdev->mc.gtt_size);
 }
 
 static void radeon_evict_flags(struct ttm_buffer_object *bo,
diff --git a/drivers/gpu/drm/ttm/ttm_range_manager.c b/drivers/gpu/drm/ttm/ttm_range_manager.c
index ae11d07eb63a..62fddcc59f02 100644
--- a/drivers/gpu/drm/ttm/ttm_range_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_range_manager.c
@@ -169,7 +169,7 @@ static const struct ttm_resource_manager_func ttm_range_manager_func = {
  * @bdev: ttm device
  * @type: memory manager type
  * @use_tt: if the memory manager uses tt
- * @p_size: size of area to be managed in pages.
+ * @size: size of area to be managed in bytes.
  *
  * The range manager is installed for this device in the type slot.
  *
@@ -177,7 +177,7 @@ static const struct ttm_resource_manager_func ttm_range_manager_func = {
  */
 int ttm_range_man_init_nocheck(struct ttm_device *bdev,
 		       unsigned type, bool use_tt,
-		       unsigned long p_size)
+		       u64 size)
 {
 	struct ttm_resource_manager *man;
 	struct ttm_range_manager *rman;
@@ -191,9 +191,9 @@ int ttm_range_man_init_nocheck(struct ttm_device *bdev,
 
 	man->func = &ttm_range_manager_func;
 
-	ttm_resource_manager_init(man, bdev, p_size);
+	ttm_resource_manager_init(man, bdev, size);
 
-	drm_mm_init(&rman->mm, 0, p_size);
+	drm_mm_init(&rman->mm, 0, size);
 	spin_lock_init(&rman->lock);
 
 	ttm_set_driver_manager(bdev, type, &rman->manager);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 2588615a2a38..18cf4edea197 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -706,7 +706,7 @@ static int vmw_vram_manager_init(struct vmw_private *dev_priv)
 {
 	int ret;
 	ret = ttm_range_man_init(&dev_priv->bdev, TTM_PL_VRAM, false,
-				 dev_priv->vram_size >> PAGE_SHIFT);
+				 dev_priv->vram_size);
 	ttm_resource_manager_set_used(ttm_manager_type(&dev_priv->bdev, TTM_PL_VRAM), false);
 	return ret;
 }
diff --git a/include/drm/ttm/ttm_range_manager.h b/include/drm/ttm/ttm_range_manager.h
index 7963b957e9ef..05bffded1b53 100644
--- a/include/drm/ttm/ttm_range_manager.h
+++ b/include/drm/ttm/ttm_range_manager.h
@@ -36,15 +36,15 @@ to_ttm_range_mgr_node(struct ttm_resource *res)
 
 int ttm_range_man_init_nocheck(struct ttm_device *bdev,
 		       unsigned type, bool use_tt,
-		       unsigned long p_size);
+		       u64 size);
 int ttm_range_man_fini_nocheck(struct ttm_device *bdev,
 		       unsigned type);
 static __always_inline int ttm_range_man_init(struct ttm_device *bdev,
 		       unsigned int type, bool use_tt,
-		       unsigned long p_size)
+		       u64 size)
 {
 	BUILD_BUG_ON(__builtin_constant_p(type) && type >= TTM_NUM_MEM_TYPES);
-	return ttm_range_man_init_nocheck(bdev, type, use_tt, p_size);
+	return ttm_range_man_init_nocheck(bdev, type, use_tt, size);
 }
 
 static __always_inline int ttm_range_man_fini(struct ttm_device *bdev,
