1 files changed, 31 insertions, 0 deletions

diff --git a/fs/super.c b/fs/super.c
index 6987824d0dce..15671cd048b1 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -220,6 +220,37 @@ static int grab_super(struct super_block *s) __releases(sb_lock)
         return 0;
 }
 
+/*
+ * Write out and wait upon all dirty data associated with this
+ * superblock.  Filesystem data as well as the underlying block
+ * device.  Takes the superblock lock.  Requires a second blkdev
+ * flush by the caller to complete the operation.
+ */
+void __fsync_super(struct super_block *sb)
+{
+        sync_inodes_sb(sb, 0);
+        DQUOT_SYNC(sb);
+        lock_super(sb);
+        if (sb->s_dirt && sb->s_op->write_super)
+                sb->s_op->write_super(sb);
+        unlock_super(sb);
+        if (sb->s_op->sync_fs)
+                sb->s_op->sync_fs(sb, 1);
+        sync_blockdev(sb->s_bdev);
+        sync_inodes_sb(sb, 1);
+}
+
+/*
+ * Write out and wait upon all dirty data associated with this
+ * superblock.  Filesystem data as well as the underlying block
+ * device.  Takes the superblock lock.
+ */
+int fsync_super(struct super_block *sb)
+{
+        __fsync_super(sb);
+        return sync_blockdev(sb->s_bdev);
+}
+
 /**
  *      generic_shutdown_super  -       common helper for ->kill_sb()
  *      @sb: superblock to kill