drm: Split drm_map and drm_local_map

Once upon a time, the DRM made the distinction between the drm_map
data structure exchanged with user space and the drm_local_map used
in the kernel.

For some reasons, while the BSD port still has that "feature", the
linux part abused drm_map for kernel internal usage as the local
map only existed as a typedef of the struct drm_map.

This patch fixes it by declaring struct drm_local_map separately
(though its content is currently identical to the userspace variant),
and changing the kernel code to only use that, except when it's a
user<->kernel interface (ie. ioctl).

This allows subsequent changes to the in-kernel format

I've also replaced the use of drm_local_map_t with struct drm_local_map
in a couple of places. Mostly by accident but they are the same (the
former is a typedef of the later) and I have some remote plans and
half finished patch to completely kill the drm_local_map_t typedef
so I left those bits in.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index 3ffae021d280..0d8bbd72ec55 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -91,7 +91,7 @@ static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
         struct drm_file *priv = vma->vm_file->private_data;
         struct drm_device *dev = priv->minor->dev;
-        struct drm_map *map = NULL;
+        struct drm_local_map *map = NULL;
         struct drm_map_list *r_list;
         struct drm_hash_item *hash;
 
@@ -176,7 +176,7 @@ static int drm_do_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
  */
 static int drm_do_vm_shm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
-        struct drm_map *map = (struct drm_map *) vma->vm_private_data;
+        struct drm_local_map *map = vma->vm_private_data;
         unsigned long offset;
         unsigned long i;
         struct page *page;
@@ -209,7 +209,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
         struct drm_file *priv = vma->vm_file->private_data;
         struct drm_device *dev = priv->minor->dev;
         struct drm_vma_entry *pt, *temp;
-        struct drm_map *map;
+        struct drm_local_map *map;
         struct drm_map_list *r_list;
         int found_maps = 0;
 
@@ -322,7 +322,7 @@ static int drm_do_vm_dma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
  */
 static int drm_do_vm_sg_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
-        struct drm_map *map = (struct drm_map *) vma->vm_private_data;
+        struct drm_local_map *map = vma->vm_private_data;
         struct drm_file *priv = vma->vm_file->private_data;
         struct drm_device *dev = priv->minor->dev;
         struct drm_sg_mem *entry = dev->sg;
@@ -512,7 +512,7 @@ static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
         return 0;
 }
 
-unsigned long drm_core_get_map_ofs(struct drm_map * map)
+unsigned long drm_core_get_map_ofs(struct drm_local_map * map)
 {
         return map->offset;
 }
@@ -547,7 +547,7 @@ int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
 {
         struct drm_file *priv = filp->private_data;
         struct drm_device *dev = priv->minor->dev;
-        struct drm_map *map = NULL;
+        struct drm_local_map *map = NULL;
         unsigned long offset = 0;
         struct drm_hash_item *hash;