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>

1 files changed, 3 insertions, 0 deletions

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;