[PATCH 6/11] hfsplus: avoid useless work in hfsplus_sync_fs

[Christoph Hellwig <hch@lst.de>]

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>

Index: linux-2.6/fs/hfsplus/super.c
===================================================================
--- linux-2.6.orig/fs/hfsplus/super.c	2010-11-17 22:47:57.762004821 +0100
+++ linux-2.6/fs/hfsplus/super.c	2010-11-17 22:50:17.024003983 +0100
@@ -160,6 +160,9 @@ int hfsplus_sync_fs(struct super_block *
 	int write_backup = 0;
 	int error, error2;
 
+	if (!wait)
+		return 0;
+
 	dprint(DBG_SUPER, "hfsplus_write_super\n");
 
 	sb->s_dirt = 0;