diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b575c7a93b76ec37104db2d1ef2d25a6eab2fd14..a2b3d9de999cfdddf8d6ba440b46d6b4f1f59dc8 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 9eb09aef0313cecaea99844c653016469cc9321f..5b1072e394b26d069bcbd44c55b68dc642bd30c9 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 acfaaef8672ad2b1d2419bd7522f5556ebb1ae50..c8cc6ce9c1c3f4b035b30172e12a1c1e9c610041 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 194c506d9d20097d5d94ba09bd7e00d50bc5e0c7..6a682c229e107b21e0f5e8d87f5eee19e51158d7 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 326a67f2410bf95c8f4299ef03de214b8d529964..0b0cdf206dc44d7151171934344c6d17af26dea1 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 508c03dfef254b9dc8c3a7a1e3e7307d3a7201b3..e2999a070a99a2b9495d1406e7727b91f980a7ee 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 1bf69b6571a370b657bf06fcf31a9892f177ae8f..38554bc3537558b8fa9deccff5dbc1ff7ceb3b12 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 4da9cf0a935c333ceb5b2ecf75685fe3bed3edd6..8b778e37dc6defeab7c133840a5fadc64ea6c0aa 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 85690859a2a8c7eb4232125c796c6261cff0a71f..fc4f361a86bb125239ee3a33a5abb5c08720332f 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 55515cce1cc22f9c13330538fcd45e2f40d2b7a9..afc7f902d74a3eff5d1f8a5e407159c5d28625f7 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 82b8b18ee1ebcdf19e873b5bb3d4ab9f2748f539..5d9fc01b60a610da27f0e133c04d21bfa9ff00a6 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 99eb1977e78498154f373d15609bdcd376a13749..e3336d904f64d3762a1e8bcf638bb6e6ba56c60d 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 8429c88427ff61729feb632dd91c6103c7718f39..2a8571f72b173b2d06ef14d8576536b8052056b9 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 474d3fa32a28c6bc4868598f311f4fc4e3e41f34..d6961d3c6f9e2673b8ecf0b9d4e610b77e42750a 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 c87099b2ea505ad805f22a5d0f973e98dc4d3f20..223d47937c4858893d5231b584834c0106ca59bf 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>
  *