[XFS] Provide a mechiansm for flushing delalloc before quota reporting.

SGI-PV: 942815
SGI-Modid: xfs-linux:xfs-kern:23829a

Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_fs_subr.c b/fs/xfs/linux-2.6/xfs_fs_subr.c
index 05ebd30..88134cb 100644
--- a/fs/xfs/linux-2.6/xfs_fs_subr.c
+++ b/fs/xfs/linux-2.6/xfs_fs_subr.c
@@ -117,6 +117,8 @@
 
 	if (VN_CACHED(vp)) {
 		filemap_fdatawrite(ip->i_mapping);
+		if (flags & XFS_B_ASYNC)
+			return 0;
 		filemap_fdatawait(ip->i_mapping);
 	}