drm: powerpc can use a simpler drm_io_prot()

What the code does is equivalent to the x86 code, so let's use
it as well

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index 06cad03..b2b231c 100644 (file)
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -57,15 +57,11 @@ static pgprot_t drm_io_prot(struct drm_local_map *map,
 {
        pgprot_t tmp = vm_get_page_prot(vma->vm_flags);
 
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__)
        if (map->type == _DRM_REGISTERS && !(map->flags & _DRM_WRITE_COMBINING))
                tmp = pgprot_noncached(tmp);
        else
                tmp = pgprot_writecombine(tmp);
-#elif defined(__powerpc__)
-       pgprot_val(tmp) |= _PAGE_NO_CACHE;
-       if (map->type == _DRM_REGISTERS)
-               pgprot_val(tmp) |= _PAGE_GUARDED;
 #elif defined(__ia64__)
        if (efi_range_is_wc(vma->vm_start, vma->vm_end -
                                    vma->vm_start))