From: Namjae Jeon <namjae.jeon@samsung.com>
Date: Sat, 1 Dec 2012 01:56:01 +0000 (+0900)
Subject: f2fs: check read only condition before beginning write out
X-Git-Tag: v3.8-rc1~23^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1fa95b0b6798164a31c1048efdf62b71038eb3d5;p=profile%2Fivi%2Fkernel-x86-ivi.git

f2fs: check read only condition before beginning write out

If the filesystem is mounted as read-only then return from that point itself
instead of first doing a writeout/wait and then checking for read-only
condition.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index c1a108f..89241c5 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -132,14 +132,15 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 		.for_reclaim = 0,
 	};
 
+	if (inode->i_sb->s_flags & MS_RDONLY)
+		return 0;
+
 	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
 	if (ret)
 		return ret;
 
 	mutex_lock(&inode->i_mutex);
 
-	if (inode->i_sb->s_flags & MS_RDONLY)
-		goto out;
 	if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
 		goto out;