drm: PAGE_CACHE_WC is x86 only so far

The page protections need to be checked whether they need to be more flexible.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index b3939de6affd895c1a0d5a6dd8efa0423d915034..9da5814528749a82b4ef12a1b13134d34635557b 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -516,7 +516,9 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
        vma->vm_private_data = map->handle;
        /* FIXME: use pgprot_writecombine when available */
        prot = pgprot_val(vma->vm_page_prot);
+#ifdef CONFIG_X86
        prot |= _PAGE_CACHE_WC;
+#endif
        vma->vm_page_prot = __pgprot(prot);
 
        vma->vm_file = filp;    /* Needed for drm_vm_open() */