Btrfs: rename btrfs_start_all_delalloc_inodes

rename the function -- btrfs_start_all_delalloc_inodes(), and make its
name be compatible to btrfs_wait_ordered_roots(), since they are always
used at the same place.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index d4f2861..1d04b55 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -4542,7 +4542,7 @@
 	case BTRFS_IOC_SYNC: {
 		int ret;
 
-		ret = btrfs_start_all_delalloc_inodes(root->fs_info, 0);
+		ret = btrfs_start_delalloc_roots(root->fs_info, 0);
 		if (ret)
 			return ret;
 		ret = btrfs_sync_fs(file->f_dentry->d_sb, 1);