udf: BKL ioctl pushdown

Convert udf_ioctl to an unlocked_ioctl and push the BKL down into it.

Signed-off-by: John Kacur <jkacur@redhat.com
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index f0f2a43..3a84455 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -209,6 +209,6 @@
 const struct file_operations udf_dir_operations = {
 	.read			= generic_read_dir,
 	.readdir		= udf_readdir,
-	.ioctl			= udf_ioctl,
+	.unlocked_ioctl		= udf_ioctl,
 	.fsync			= simple_fsync,
 };