[Xen-devel] [PATCH v4 5/9] drm/xen/xen_drm_front_gem.c: Convert to use vm_map_pages()

[Souptick Joarder <jrdr.linux@xxxxxxxxx>]

Convert to use vm_map_pages() to map range of kernel
memory to user vma.

Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
---
 drivers/gpu/drm/xen/xen_drm_front_gem.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c 
b/drivers/gpu/drm/xen/xen_drm_front_gem.c
index 28bc501..dd0602d 100644
--- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
@@ -224,8 +224,7 @@ struct drm_gem_object *
 static int gem_mmap_obj(struct xen_gem_object *xen_obj,
                        struct vm_area_struct *vma)
 {
-       unsigned long addr = vma->vm_start;
-       int i;
+       int ret;
 
        /*
         * clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the
@@ -246,18 +245,11 @@ static int gem_mmap_obj(struct xen_gem_object *xen_obj,
         * FIXME: as we insert all the pages now then no .fault handler must
         * be called, so don't provide one
         */
-       for (i = 0; i < xen_obj->num_pages; i++) {
-               int ret;
-
-               ret = vm_insert_page(vma, addr, xen_obj->pages[i]);
-               if (ret < 0) {
-                       DRM_ERROR("Failed to insert pages into vma: %d\n", ret);
-                       return ret;
-               }
+       ret = vm_map_pages(vma, xen_obj->pages, xen_obj->num_pages);
+       if (ret < 0)
+               DRM_ERROR("Failed to map pages into vma: %d\n", ret);
 
-               addr += PAGE_SIZE;
-       }
-       return 0;
+       return ret;
 }
 
 int xen_drm_front_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-- 
1.9.1


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