xen-gntdev: Add cast to pointer

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index cdc28dc8b5d9..d43ff3072c99 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -298,8 +298,8 @@ static int __unmap_grant_pages(struct grant_map *map, int offset, int pages)
         if (map->notify.flags & UNMAP_NOTIFY_CLEAR_BYTE) {
                 int pgno = (map->notify.addr >> PAGE_SHIFT);
                 if (pgno >= offset && pgno < offset + pages && use_ptemod) {
-                        void __user *tmp;
-                        tmp = map->vma->vm_start + map->notify.addr;
+                        void __user *tmp = (void __user *)
+                                map->vma->vm_start + map->notify.addr;
                         err = copy_to_user(tmp, &err, 1);
                         if (err)
                                 return err;