[PATCH 18/24] sd: add a SPDX tag to sd.c

[Christoph Hellwig <hch@xxxxxx>]

sd.c is the only sd file missing licensing information.  Add a
GPLv2 tag for the default kernel license.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 drivers/scsi/sd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 2b2bc4b49d78..4852c2223359 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *      sd.c Copyright (C) 1992 Drew Eckhardt
  *           Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
-- 
2.20.1