diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index e2f7b6e93efddf85dd45457d70ce3c3bc3602ba3..bfec1485ca2332ac5bfe8adf2e7c6c50307a3c97 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  bus driver for ccwgroup
  *
diff --git a/drivers/s390/cio/chp.c b/drivers/s390/cio/chp.c
index f4166f80c4d4e4408c97e8742a7275b90464898d..5c94a3aec4dd293dfdce50e33219037564ebf118 100644
--- a/drivers/s390/cio/chp.c
+++ b/drivers/s390/cio/chp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *    Copyright IBM Corp. 1999, 2010
  *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 7b0b295b2313b8f3056378ed64c4249381a0213b..c08fc5a8df0c61935c02e282a6ec868d2d0e7630 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *   S/390 common I/O routines -- channel subsystem call
  *
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index 8e7e19b9e92c028e1097fe9ff82386203594bc37..0015729d917d90e049a1def14cba883ec2c31cc3 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for s390 chsc subchannels
  *
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 89216174fcbba8f83d3a0a79a633f6e1cb91ad88..987bf9a8c9f7237d06c578e42807a6e168ef7dfd 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *   S/390 common I/O routines -- low level i/o calls
  *
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index 7d59230e88bb3a2452e8e4eaf667f25659d3d13d..320ce009ba41abff0d0af69266a954c6d8fe7943 100644
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Linux on zSeries Channel Measurement Facility support
  *
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index d3e504c3c362655f4eec5903893d8bc8f8e5af2c..f4c2e71e7a562dae91f0eca981463fbe02eb0e30 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * driver for channel subsystem
  *
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 318d8269f5dee10c56114224b4a08b8b617a96da..e4ed6c651bcacc967dfb8c387ccde236d9acd178 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  *  bus driver for ccw devices
  *
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index dd7d79d30edc440662a02432a3ad3ce822503225..1319122e9d1231920ef0325a9e56a4c6de91ff80 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * finite state machine for device handling
  *
diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index cf8c4ac6323a6d1c91dfe93dfdb22e2d9d0432b3..aa125d92cc6508d00750c82652e68be301c3de05 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-1.0+
 /*
  * Copyright IBM Corp. 2002, 2009
  *
diff --git a/drivers/s390/cio/eadm_sch.c b/drivers/s390/cio/eadm_sch.c
index ce16e4f45d440fd25538d9223db5e07566ad22f5..53468ae64b999fa17bc154bb7eeda57293aed2da 100644
--- a/drivers/s390/cio/eadm_sch.c
+++ b/drivers/s390/cio/eadm_sch.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for s390 eadm subchannels
  *
diff --git a/drivers/s390/cio/isc.c b/drivers/s390/cio/isc.c
index c592087be0f1a6b0b8083dce448e278c2388c7c9..77fde9f5ea8baeb55ff403096358d20ff7974c5e 100644
--- a/drivers/s390/cio/isc.c
+++ b/drivers/s390/cio/isc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Functions for registration of I/O interruption subclasses on s390.
  *
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index ed4852fab44b5737fa5edae05ddd640067486304..59b4a3370cd5d454cadc9e145bcb3a2dc9a321df 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Linux for s390 qdio support, buffer handling, qdio API and module support.
  *
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index 9ae1380cbc31300f5e251f03e6027ad903b2d666..98f3cfdc0d027dd0c0e7bcd8d05be86c0fc3a09d 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * qdio queue initialization
  *
diff --git a/drivers/s390/cio/scm.c b/drivers/s390/cio/scm.c
index 1fa53ecdc2aaa2ec1a81b7bf65b5d0dcf32a16c2..6bca1d5455d4f6ce1997d39d09792a90e65511a0 100644
--- a/drivers/s390/cio/scm.c
+++ b/drivers/s390/cio/scm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Recognize and maintain s390 storage class memory.
  *
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index 82f05c4b8c526f73a52aed819eacb33cdfd18e3a..ea6a2d0b2894decac95c3421c544183ee89c3383 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * VFIO based Physical Subchannel device driver
  *