From: Christoph Hellwig <hch@tuxera.com>
Date: Tue, 23 Nov 2010 13:38:02 +0000 (+0100)
Subject: hfsplus: avoid useless work in hfsplus_sync_fs
X-Git-Tag: archive/raspbian/4.9.13-1+rpi1~10^2~15819^2~10
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks:///%22http:/www.example.com/cgi/%22https:/%22bookmarks:/?a=commitdiff_plain;h=f02e26f8d90f8cde98314c72c2e890bc281a8346;p=linux-4.9.git

hfsplus: avoid useless work in hfsplus_sync_fs

There is no reason to write out the metadata inodes or volume headers
during a non-blocking sync, as we are almost guaranteed to dirty them
again during the inode writeouts.

Signed-off-by: Christoph Hellwig <hch@tuxera.com>
---

diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index df6bea02b2b4..56e6cf80c5e0 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -160,6 +160,9 @@ int hfsplus_sync_fs(struct super_block *sb, int wait)
 	int write_backup = 0;
 	int error, error2;
 
+	if (!wait)
+		return 0;
+
 	dprint(DBG_SUPER, "hfsplus_write_super\n");
 
 	sb->s_dirt = 0;