diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b575c7a93b76..a2b3d9de999c 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
index 9eb09aef0313..5b1072e394b2 100644
--- a/kernel/irq/cpuhotplug.c
+++ b/kernel/irq/cpuhotplug.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generic cpu hotunplug interrupt migration code copied from the
  * arch/arm implementation
diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c
index acfaaef8672a..c8cc6ce9c1c3 100644
--- a/kernel/irq/debugfs.c
+++ b/kernel/irq/debugfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2017 Thomas Gleixner <tglx@linutronix.de>
  *
diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 194c506d9d20..6a682c229e10 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
diff --git a/kernel/irq/dummychip.c b/kernel/irq/dummychip.c
index 326a67f2410b..0b0cdf206dc4 100644
--- a/kernel/irq/dummychip.c
+++ b/kernel/irq/dummychip.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index 508c03dfef25..e2999a070a99 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Library implementing the most common irq chip callback functions
  *
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 1bf69b6571a3..38554bc35375 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
diff --git a/kernel/irq/ipi.c b/kernel/irq/ipi.c
index 4da9cf0a935c..8b778e37dc6d 100644
--- a/kernel/irq/ipi.c
+++ b/kernel/irq/ipi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 Imagination Technologies Ltd
  * Author: Qais Yousef <qais.yousef@imgtec.com>
diff --git a/kernel/irq/irq_sim.c b/kernel/irq/irq_sim.c
index 85690859a2a8..fc4f361a86bb 100644
--- a/kernel/irq/irq_sim.c
+++ b/kernel/irq/irq_sim.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017 Bartosz Golaszewski <brgl@bgdev.pl>
  *
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 55515cce1cc2..afc7f902d74a 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 82b8b18ee1eb..5d9fc01b60a6 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+
 #define pr_fmt(fmt)  "irq: " fmt
 
 #include <linux/acpi.h>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 99eb1977e784..e3336d904f64 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
  * Copyright (C) 2005-2006 Thomas Gleixner
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 8429c88427ff..2a8571f72b17 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2014 Intel Corp.
  * Author: Jiang Liu <jiang.liu@linux.intel.com>
diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c
index 474d3fa32a28..d6961d3c6f9e 100644
--- a/kernel/irq/pm.c
+++ b/kernel/irq/pm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
  *
diff --git a/kernel/irq/timings.c b/kernel/irq/timings.c
index c87099b2ea50..223d47937c48 100644
--- a/kernel/irq/timings.c
+++ b/kernel/irq/timings.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2016, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
  *