[PATCH 22/24] sr: add a SPDX tag to sr.c

[Christoph Hellwig <hch@xxxxxx>]

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

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

diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 039c27c2d7b3..701d1e68d86e 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  sr.c Copyright (C) 1992 David Giller
  *           Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale
-- 
2.20.1