X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=mm%2Fshmem.c;h=171dee7a131f6959fe444405f280374be7eb25d0;hb=622c202c4a4697636334761d7ca295ebd35074e4;hp=24463b67b6efa5817e7c1e806d1bf6337d300ba2;hpb=086e3eb65e3b04d7186f5e527aa6fc375dd5495c;p=deliverable%2Flinux.git

diff --git a/mm/shmem.c b/mm/shmem.c
index 24463b67b6ef..171dee7a131f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2225,9 +2225,11 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 			error = shmem_getpage(inode, index, &page, SGP_FALLOC);
 		if (error) {
 			/* Remove the !PageUptodate pages we added */
-			shmem_undo_range(inode,
-				(loff_t)start << PAGE_SHIFT,
-				((loff_t)index << PAGE_SHIFT) - 1, true);
+			if (index > start) {
+				shmem_undo_range(inode,
+				    (loff_t)start << PAGE_SHIFT,
+				    ((loff_t)index << PAGE_SHIFT) - 1, true);
+			}
 			goto undone;
 		}