X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=mm%2Fmremap.c;h=3a3cf4cc2c632b6af79112743d8f3d8cbc9bb40b;hb=refs%2Fheads%2Fsandbox%2Fm.szyprowski%2Fvirgl;hp=badfe17ade1f06c57db60468bad7ebd55f96b55c;hpb=eadeb06e7645f7a7ddbcfac39480be3892a60ae3;p=platform%2Fkernel%2Flinux-rpi.git

diff --git a/mm/mremap.c b/mm/mremap.c
index badfe17..3a3cf4c 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -486,6 +486,9 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
 	pmd_t *old_pmd, *new_pmd;
 	pud_t *old_pud, *new_pud;
 
+	if (!len)
+		return 0;
+
 	old_end = old_addr + len;
 	flush_cache_range(vma, old_addr, old_end);