From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 14 Mar 2014 02:49:42 +0000 (-0400)
Subject: ext4: only call sync_filesystm() when remounting read-only
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=38c03b34391dd25a39576073e58485e5949d29fe;p=linux-beck.git

ext4: only call sync_filesystm() when remounting read-only

This is the only time it is required for ext4.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index a5f1170048bd..89baee42f353 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4765,8 +4765,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 #endif
 	char *orig_data = kstrdup(data, GFP_KERNEL);
 
-	sync_filesystem(sb);
-
 	/* Store the original options */
 	old_sb_flags = sb->s_flags;
 	old_opts.s_mount_opt = sbi->s_mount_opt;
@@ -4837,6 +4835,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 		}
 
 		if (*flags & MS_RDONLY) {
+			err = sync_filesystem(sb);
+			if (err < 0)
+				goto restore_opts;
 			err = dquot_suspend(sb, -1);
 			if (err < 0)
 				goto restore_opts;