From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Tue, 6 Sep 2016 20:31:56 +0000 (-0700)
Subject: f2fs: no need to make zeros beyond i_size
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=68f313935fb205822ed1f923f7833639f3c78573;p=deliverable%2Flinux.git

f2fs: no need to make zeros beyond i_size

We don't need to make zeros beyond i_size, since we already wrote that through
NEW_ADDR case.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 7c8e219f93dc..8ffb480935b3 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1647,15 +1647,6 @@ repeat:
 	if (PageUptodate(page))
 		goto out_clear;
 
-	if ((pos & PAGE_MASK) >= i_size_read(inode)) {
-		unsigned start = pos & (PAGE_SIZE - 1);
-		unsigned end = start + len;
-
-		/* Reading beyond i_size is simple: memset to zero */
-		zero_user_segments(page, 0, start, end, PAGE_SIZE);
-		goto out_update;
-	}
-
 	if (blkaddr == NEW_ADDR) {
 		zero_user_segment(page, 0, PAGE_SIZE);
 	} else {