License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

114 files changed, 114 insertions, 0 deletions

diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index 7d8b322..c7b62a3 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 config METAG
 	def_bool y
 	select EMBEDDED
diff --git a/arch/metag/Kconfig.debug b/arch/metag/Kconfig.debug
index cb5c928..ac4516c 100644
--- a/arch/metag/Kconfig.debug
+++ b/arch/metag/Kconfig.debug
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 menu "Kernel hacking"
 
 config TRACE_IRQFLAGS_SUPPORT
diff --git a/arch/metag/Kconfig.soc b/arch/metag/Kconfig.soc
index 50f979c..c521f0e 100644
--- a/arch/metag/Kconfig.soc
+++ b/arch/metag/Kconfig.soc
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 choice
 	prompt "SoC Type"
 	default META21_FPGA
diff --git a/arch/metag/boot/dts/Makefile b/arch/metag/boot/dts/Makefile
index 097c6da..ad5dde5 100644
--- a/arch/metag/boot/dts/Makefile
+++ b/arch/metag/boot/dts/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 dtb-y	+= skeleton.dtb
 dtb-y	+= tz1090_generic.dtb
 
diff --git a/arch/metag/boot/dts/skeleton.dtsi b/arch/metag/boot/dts/skeleton.dtsi
index 78229ea..43e2ffe 100644
--- a/arch/metag/boot/dts/skeleton.dtsi
+++ b/arch/metag/boot/dts/skeleton.dtsi
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Skeleton device tree; the bare minimum needed to boot; just include and
  * add a compatible value.  The bootloader will typically populate the memory
diff --git a/arch/metag/include/asm/atomic.h b/arch/metag/include/asm/atomic.h
index 8ff0a70..97ae189 100644
--- a/arch/metag/include/asm/atomic.h
+++ b/arch/metag/include/asm/atomic.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_ATOMIC_H
 #define __ASM_METAG_ATOMIC_H
 
diff --git a/arch/metag/include/asm/atomic_lnkget.h b/arch/metag/include/asm/atomic_lnkget.h
index def2c64..17e8c61 100644
--- a/arch/metag/include/asm/atomic_lnkget.h
+++ b/arch/metag/include/asm/atomic_lnkget.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_ATOMIC_LNKGET_H
 #define __ASM_METAG_ATOMIC_LNKGET_H
 
diff --git a/arch/metag/include/asm/atomic_lock1.h b/arch/metag/include/asm/atomic_lock1.h
index eee779f..2ce8fa3 100644
--- a/arch/metag/include/asm/atomic_lock1.h
+++ b/arch/metag/include/asm/atomic_lock1.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_ATOMIC_LOCK1_H
 #define __ASM_METAG_ATOMIC_LOCK1_H
 
diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h
index 5418517..2661fec 100644
--- a/arch/metag/include/asm/barrier.h
+++ b/arch/metag/include/asm/barrier.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_BARRIER_H
 #define _ASM_METAG_BARRIER_H
 
diff --git a/arch/metag/include/asm/bitops.h b/arch/metag/include/asm/bitops.h
index 2671134..766ad43 100644
--- a/arch/metag/include/asm/bitops.h
+++ b/arch/metag/include/asm/bitops.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_BITOPS_H
 #define __ASM_METAG_BITOPS_H
 
diff --git a/arch/metag/include/asm/bug.h b/arch/metag/include/asm/bug.h
index 9f8967f..ee07a94 100644
--- a/arch/metag/include/asm/bug.h
+++ b/arch/metag/include/asm/bug.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_BUG_H
 #define _ASM_METAG_BUG_H
 
diff --git a/arch/metag/include/asm/cache.h b/arch/metag/include/asm/cache.h
index a43b650..b5df022 100644
--- a/arch/metag/include/asm/cache.h
+++ b/arch/metag/include/asm/cache.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_CACHE_H
 #define __ASM_METAG_CACHE_H
 
diff --git a/arch/metag/include/asm/cacheflush.h b/arch/metag/include/asm/cacheflush.h
index 7787ec5..2584a51 100644
--- a/arch/metag/include/asm/cacheflush.h
+++ b/arch/metag/include/asm/cacheflush.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_CACHEFLUSH_H
 #define _METAG_CACHEFLUSH_H
 
diff --git a/arch/metag/include/asm/cachepart.h b/arch/metag/include/asm/cachepart.h
index cf6b44e..79411e9 100644
--- a/arch/metag/include/asm/cachepart.h
+++ b/arch/metag/include/asm/cachepart.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Meta cache partition manipulation.
  *
diff --git a/arch/metag/include/asm/checksum.h b/arch/metag/include/asm/checksum.h
index f65fe83..6533d14 100644
--- a/arch/metag/include/asm/checksum.h
+++ b/arch/metag/include/asm/checksum.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_CHECKSUM_H
 #define _METAG_CHECKSUM_H
 
diff --git a/arch/metag/include/asm/cmpxchg.h b/arch/metag/include/asm/cmpxchg.h
index be29e3e..68c4ab1 100644
--- a/arch/metag/include/asm/cmpxchg.h
+++ b/arch/metag/include/asm/cmpxchg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_CMPXCHG_H
 #define __ASM_METAG_CMPXCHG_H
 
diff --git a/arch/metag/include/asm/cmpxchg_irq.h b/arch/metag/include/asm/cmpxchg_irq.h
index 6495731..5255e37 100644
--- a/arch/metag/include/asm/cmpxchg_irq.h
+++ b/arch/metag/include/asm/cmpxchg_irq.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_CMPXCHG_IRQ_H
 #define __ASM_METAG_CMPXCHG_IRQ_H
 
diff --git a/arch/metag/include/asm/cmpxchg_lnkget.h b/arch/metag/include/asm/cmpxchg_lnkget.h
index 2369ad3..c69be00 100644
--- a/arch/metag/include/asm/cmpxchg_lnkget.h
+++ b/arch/metag/include/asm/cmpxchg_lnkget.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_CMPXCHG_LNKGET_H
 #define __ASM_METAG_CMPXCHG_LNKGET_H
 
diff --git a/arch/metag/include/asm/cmpxchg_lock1.h b/arch/metag/include/asm/cmpxchg_lock1.h
index fd68504..5976e39 100644
--- a/arch/metag/include/asm/cmpxchg_lock1.h
+++ b/arch/metag/include/asm/cmpxchg_lock1.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_CMPXCHG_LOCK1_H
 #define __ASM_METAG_CMPXCHG_LOCK1_H
 
diff --git a/arch/metag/include/asm/core_reg.h b/arch/metag/include/asm/core_reg.h
index bdbc3a5..ca70a0a 100644
--- a/arch/metag/include/asm/core_reg.h
+++ b/arch/metag/include/asm/core_reg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_CORE_REG_H_
 #define __ASM_METAG_CORE_REG_H_
 
diff --git a/arch/metag/include/asm/cpu.h b/arch/metag/include/asm/cpu.h
index decf129..9dac67d 100644
--- a/arch/metag/include/asm/cpu.h
+++ b/arch/metag/include/asm/cpu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_CPU_H
 #define _ASM_METAG_CPU_H
 
diff --git a/arch/metag/include/asm/da.h b/arch/metag/include/asm/da.h
index 81bd521..901daa5 100644
--- a/arch/metag/include/asm/da.h
+++ b/arch/metag/include/asm/da.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Meta DA JTAG debugger control.
  *
diff --git a/arch/metag/include/asm/delay.h b/arch/metag/include/asm/delay.h
index 9c92f99..fd73d3d 100644
--- a/arch/metag/include/asm/delay.h
+++ b/arch/metag/include/asm/delay.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_DELAY_H
 #define _METAG_DELAY_H
 
diff --git a/arch/metag/include/asm/div64.h b/arch/metag/include/asm/div64.h
index 0fdd116..e3686d2 100644
--- a/arch/metag/include/asm/div64.h
+++ b/arch/metag/include/asm/div64.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_DIV64_H__
 #define __ASM_DIV64_H__
 
diff --git a/arch/metag/include/asm/dma-mapping.h b/arch/metag/include/asm/dma-mapping.h
index ea573be..7465ce5 100644
--- a/arch/metag/include/asm/dma-mapping.h
+++ b/arch/metag/include/asm/dma-mapping.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_DMA_MAPPING_H
 #define _ASM_METAG_DMA_MAPPING_H
 
diff --git a/arch/metag/include/asm/elf.h b/arch/metag/include/asm/elf.h
index 87b0cf1..a6c3380 100644
--- a/arch/metag/include/asm/elf.h
+++ b/arch/metag/include/asm/elf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_ELF_H
 #define __ASM_METAG_ELF_H
 
diff --git a/arch/metag/include/asm/ftrace.h b/arch/metag/include/asm/ftrace.h
index a2269d6..b1c8c76 100644
--- a/arch/metag/include/asm/ftrace.h
+++ b/arch/metag/include/asm/ftrace.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_FTRACE
 #define _ASM_METAG_FTRACE
 
diff --git a/arch/metag/include/asm/global_lock.h b/arch/metag/include/asm/global_lock.h
index fc831c8..4d3da96 100644
--- a/arch/metag/include/asm/global_lock.h
+++ b/arch/metag/include/asm/global_lock.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_GLOBAL_LOCK_H
 #define __ASM_METAG_GLOBAL_LOCK_H
 
diff --git a/arch/metag/include/asm/highmem.h b/arch/metag/include/asm/highmem.h
index 9b1d172..8b0dfd6 100644
--- a/arch/metag/include/asm/highmem.h
+++ b/arch/metag/include/asm/highmem.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_HIGHMEM_H
 #define _ASM_HIGHMEM_H
 
diff --git a/arch/metag/include/asm/hugetlb.h b/arch/metag/include/asm/hugetlb.h
index 905ed42..1607363 100644
--- a/arch/metag/include/asm/hugetlb.h
+++ b/arch/metag/include/asm/hugetlb.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_HUGETLB_H
 #define _ASM_METAG_HUGETLB_H
 
diff --git a/arch/metag/include/asm/hwthread.h b/arch/metag/include/asm/hwthread.h
index 8f97866..8d2171d 100644
--- a/arch/metag/include/asm/hwthread.h
+++ b/arch/metag/include/asm/hwthread.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2008 Imagination Technologies
  */
diff --git a/arch/metag/include/asm/io.h b/arch/metag/include/asm/io.h
index 9890f21..71cd2bc 100644
--- a/arch/metag/include/asm/io.h
+++ b/arch/metag/include/asm/io.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_IO_H
 #define _ASM_METAG_IO_H
 
diff --git a/arch/metag/include/asm/irq.h b/arch/metag/include/asm/irq.h
index 6ac6d4a..cb02c29 100644
--- a/arch/metag/include/asm/irq.h
+++ b/arch/metag/include/asm/irq.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_IRQ_H
 #define __ASM_METAG_IRQ_H
 
diff --git a/arch/metag/include/asm/irqflags.h b/arch/metag/include/asm/irqflags.h
index 339b16f..e2fe34a 100644
--- a/arch/metag/include/asm/irqflags.h
+++ b/arch/metag/include/asm/irqflags.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * IRQ flags handling
  *
diff --git a/arch/metag/include/asm/l2cache.h b/arch/metag/include/asm/l2cache.h
index bffbeaa..f260b15 100644
--- a/arch/metag/include/asm/l2cache.h
+++ b/arch/metag/include/asm/l2cache.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_L2CACHE_H
 #define _METAG_L2CACHE_H
 
diff --git a/arch/metag/include/asm/linkage.h b/arch/metag/include/asm/linkage.h
index 73bf25b..3a9024e 100644
--- a/arch/metag/include/asm/linkage.h
+++ b/arch/metag/include/asm/linkage.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_LINKAGE_H
 #define __ASM_LINKAGE_H
 
diff --git a/arch/metag/include/asm/mman.h b/arch/metag/include/asm/mman.h
index 17999db..dcb0d20 100644
--- a/arch/metag/include/asm/mman.h
+++ b/arch/metag/include/asm/mman.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __METAG_MMAN_H__
 #define __METAG_MMAN_H__
 
diff --git a/arch/metag/include/asm/mmu.h b/arch/metag/include/asm/mmu.h
index 9c32114..cab5a01 100644
--- a/arch/metag/include/asm/mmu.h
+++ b/arch/metag/include/asm/mmu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __MMU_H
 #define __MMU_H
 
diff --git a/arch/metag/include/asm/mmu_context.h b/arch/metag/include/asm/mmu_context.h
index 2e03127..7b47663 100644
--- a/arch/metag/include/asm/mmu_context.h
+++ b/arch/metag/include/asm/mmu_context.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __METAG_MMU_CONTEXT_H
 #define __METAG_MMU_CONTEXT_H
 
diff --git a/arch/metag/include/asm/mmzone.h b/arch/metag/include/asm/mmzone.h
index 9c88a9c..8627fb5 100644
--- a/arch/metag/include/asm/mmzone.h
+++ b/arch/metag/include/asm/mmzone.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_MMZONE_H
 #define __ASM_METAG_MMZONE_H
 
diff --git a/arch/metag/include/asm/module.h b/arch/metag/include/asm/module.h
index e47e609..e957171 100644
--- a/arch/metag/include/asm/module.h
+++ b/arch/metag/include/asm/module.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_MODULE_H
 #define _ASM_METAG_MODULE_H
 
diff --git a/arch/metag/include/asm/page.h b/arch/metag/include/asm/page.h
index 1e8e281..9e994d7 100644
--- a/arch/metag/include/asm/page.h
+++ b/arch/metag/include/asm/page.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_PAGE_H
 #define _METAG_PAGE_H
 
diff --git a/arch/metag/include/asm/pgalloc.h b/arch/metag/include/asm/pgalloc.h
index c2caa1e..0b9d95d 100644
--- a/arch/metag/include/asm/pgalloc.h
+++ b/arch/metag/include/asm/pgalloc.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_PGALLOC_H
 #define _METAG_PGALLOC_H
 
diff --git a/arch/metag/include/asm/pgtable-bits.h b/arch/metag/include/asm/pgtable-bits.h
index 25ba672..5f6b822 100644
--- a/arch/metag/include/asm/pgtable-bits.h
+++ b/arch/metag/include/asm/pgtable-bits.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Meta page table definitions.
  */
diff --git a/arch/metag/include/asm/pgtable.h b/arch/metag/include/asm/pgtable.h
index 0c151e5..a3422f0 100644
--- a/arch/metag/include/asm/pgtable.h
+++ b/arch/metag/include/asm/pgtable.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Macros and functions to manipulate Meta page tables.
  */
diff --git a/arch/metag/include/asm/processor.h b/arch/metag/include/asm/processor.h
index 8ae92d6..9a0c502 100644
--- a/arch/metag/include/asm/processor.h
+++ b/arch/metag/include/asm/processor.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2005,2006,2007,2008 Imagination Technologies
  */
diff --git a/arch/metag/include/asm/ptrace.h b/arch/metag/include/asm/ptrace.h
index fcabc18..9074f25 100644
--- a/arch/metag/include/asm/ptrace.h
+++ b/arch/metag/include/asm/ptrace.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_PTRACE_H
 #define _METAG_PTRACE_H
 
diff --git a/arch/metag/include/asm/setup.h b/arch/metag/include/asm/setup.h
index e9fdee9..504621d7 100644
--- a/arch/metag/include/asm/setup.h
+++ b/arch/metag/include/asm/setup.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_SETUP_H
 #define _ASM_METAG_SETUP_H
 
diff --git a/arch/metag/include/asm/smp.h b/arch/metag/include/asm/smp.h
index 1d7e770..8d3683d 100644
--- a/arch/metag/include/asm/smp.h
+++ b/arch/metag/include/asm/smp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_SMP_H
 #define __ASM_SMP_H
 
diff --git a/arch/metag/include/asm/sparsemem.h b/arch/metag/include/asm/sparsemem.h
index 03fe255..2942894 100644
--- a/arch/metag/include/asm/sparsemem.h
+++ b/arch/metag/include/asm/sparsemem.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_SPARSEMEM_H
 #define __ASM_METAG_SPARSEMEM_H
 
diff --git a/arch/metag/include/asm/spinlock.h b/arch/metag/include/asm/spinlock.h
index ddf7fe5..349938c 100644
--- a/arch/metag/include/asm/spinlock.h
+++ b/arch/metag/include/asm/spinlock.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_SPINLOCK_H
 #define __ASM_SPINLOCK_H
 
diff --git a/arch/metag/include/asm/spinlock_lnkget.h b/arch/metag/include/asm/spinlock_lnkget.h
index ad8436f..0299355 100644
--- a/arch/metag/include/asm/spinlock_lnkget.h
+++ b/arch/metag/include/asm/spinlock_lnkget.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_SPINLOCK_LNKGET_H
 #define __ASM_SPINLOCK_LNKGET_H
 
diff --git a/arch/metag/include/asm/spinlock_lock1.h b/arch/metag/include/asm/spinlock_lock1.h
index c630444..12de986 100644
--- a/arch/metag/include/asm/spinlock_lock1.h
+++ b/arch/metag/include/asm/spinlock_lock1.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_SPINLOCK_LOCK1_H
 #define __ASM_SPINLOCK_LOCK1_H
 
diff --git a/arch/metag/include/asm/spinlock_types.h b/arch/metag/include/asm/spinlock_types.h
index b763914..cd197f1 100644
--- a/arch/metag/include/asm/spinlock_types.h
+++ b/arch/metag/include/asm/spinlock_types.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_SPINLOCK_TYPES_H
 #define _ASM_METAG_SPINLOCK_TYPES_H
 
diff --git a/arch/metag/include/asm/stacktrace.h b/arch/metag/include/asm/stacktrace.h
index 2830a0f..f45e3cb 100644
--- a/arch/metag/include/asm/stacktrace.h
+++ b/arch/metag/include/asm/stacktrace.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_STACKTRACE_H
 #define __ASM_STACKTRACE_H
 
diff --git a/arch/metag/include/asm/string.h b/arch/metag/include/asm/string.h
index 53e3806..86f9614 100644
--- a/arch/metag/include/asm/string.h
+++ b/arch/metag/include/asm/string.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_STRING_H_
 #define _METAG_STRING_H_
 
diff --git a/arch/metag/include/asm/syscalls.h b/arch/metag/include/asm/syscalls.h
index a02b955..eac0cf1 100644
--- a/arch/metag/include/asm/syscalls.h
+++ b/arch/metag/include/asm/syscalls.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_SYSCALLS_H
 #define _ASM_METAG_SYSCALLS_H
 
diff --git a/arch/metag/include/asm/tcm.h b/arch/metag/include/asm/tcm.h
index 7711c31..a0a4997 100644
--- a/arch/metag/include/asm/tcm.h
+++ b/arch/metag/include/asm/tcm.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_TCM_H__
 #define __ASM_TCM_H__
 
diff --git a/arch/metag/include/asm/thread_info.h b/arch/metag/include/asm/thread_info.h
index 32677cc..554f73a 100644
--- a/arch/metag/include/asm/thread_info.h
+++ b/arch/metag/include/asm/thread_info.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* thread_info.h: Meta low-level thread information
  *
  * Copyright (C) 2002  David Howells (dhowells@redhat.com)
diff --git a/arch/metag/include/asm/tlb.h b/arch/metag/include/asm/tlb.h
index 048282f1..fbe6ee9 100644
--- a/arch/metag/include/asm/tlb.h
+++ b/arch/metag/include/asm/tlb.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_TLB_H
 #define __ASM_METAG_TLB_H
 
diff --git a/arch/metag/include/asm/tlbflush.h b/arch/metag/include/asm/tlbflush.h
index 566acf9..f3e5d99 100644
--- a/arch/metag/include/asm/tlbflush.h
+++ b/arch/metag/include/asm/tlbflush.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __ASM_METAG_TLBFLUSH_H
 #define __ASM_METAG_TLBFLUSH_H
 
diff --git a/arch/metag/include/asm/topology.h b/arch/metag/include/asm/topology.h
index 707c7f7..df0d9e6 100644
--- a/arch/metag/include/asm/topology.h
+++ b/arch/metag/include/asm/topology.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_METAG_TOPOLOGY_H
 #define _ASM_METAG_TOPOLOGY_H
 
diff --git a/arch/metag/include/asm/uaccess.h b/arch/metag/include/asm/uaccess.h
index 47469e2..a5311eb 100644
--- a/arch/metag/include/asm/uaccess.h
+++ b/arch/metag/include/asm/uaccess.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __METAG_UACCESS_H
 #define __METAG_UACCESS_H
 
diff --git a/arch/metag/include/asm/user_gateway.h b/arch/metag/include/asm/user_gateway.h
index e404c09..cf2392b9 100644
--- a/arch/metag/include/asm/user_gateway.h
+++ b/arch/metag/include/asm/user_gateway.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2010 Imagination Technologies
  */
diff --git a/arch/metag/kernel/Makefile b/arch/metag/kernel/Makefile
index d7675f4..73441d8 100644
--- a/arch/metag/kernel/Makefile
+++ b/arch/metag/kernel/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the Linux/Meta kernel.
 #
diff --git a/arch/metag/kernel/asm-offsets.c b/arch/metag/kernel/asm-offsets.c
index bfc9205..d9b348b 100644
--- a/arch/metag/kernel/asm-offsets.c
+++ b/arch/metag/kernel/asm-offsets.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This program is used to generate definitions needed by
  * assembly language modules.
diff --git a/arch/metag/kernel/cachepart.c b/arch/metag/kernel/cachepart.c
index db944c2..6e0f8a8 100644
--- a/arch/metag/kernel/cachepart.c
+++ b/arch/metag/kernel/cachepart.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Meta cache partition manipulation.
  *
diff --git a/arch/metag/kernel/core_reg.c b/arch/metag/kernel/core_reg.c
index 671cce8..df2833f 100644
--- a/arch/metag/kernel/core_reg.c
+++ b/arch/metag/kernel/core_reg.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Support for reading and writing Meta core internal registers.
  *
diff --git a/arch/metag/kernel/head.S b/arch/metag/kernel/head.S
index 713f71d..3ed2781 100644
--- a/arch/metag/kernel/head.S
+++ b/arch/metag/kernel/head.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 	! Copyright 2005,2006,2007,2009 Imagination Technologies
 
 #include <linux/init.h>
diff --git a/arch/metag/kernel/irq.c b/arch/metag/kernel/irq.c
index c993960..704cf17 100644
--- a/arch/metag/kernel/irq.c
+++ b/arch/metag/kernel/irq.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Linux/Meta general interrupt handling code
  *
diff --git a/arch/metag/kernel/machines.c b/arch/metag/kernel/machines.c
index 1edf6ba..e497901 100644
--- a/arch/metag/kernel/machines.c
+++ b/arch/metag/kernel/machines.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  arch/metag/kernel/machines.c
  *
diff --git a/arch/metag/kernel/metag_ksyms.c b/arch/metag/kernel/metag_ksyms.c
index 215c94a..e312386 100644
--- a/arch/metag/kernel/metag_ksyms.c
+++ b/arch/metag/kernel/metag_ksyms.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/export.h>
 #include <linux/types.h>
 
diff --git a/arch/metag/kernel/perf_callchain.c b/arch/metag/kernel/perf_callchain.c
index 3e8e048..d325ba1 100644
--- a/arch/metag/kernel/perf_callchain.c
+++ b/arch/metag/kernel/perf_callchain.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Perf callchain handling code.
  *
diff --git a/arch/metag/kernel/process.c b/arch/metag/kernel/process.c
index c4606ce..0909834 100644
--- a/arch/metag/kernel/process.c
+++ b/arch/metag/kernel/process.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2005,2006,2007,2008,2009,2010,2011 Imagination Technologies
  *
diff --git a/arch/metag/kernel/signal.c b/arch/metag/kernel/signal.c
index 338925d..e64e8b0 100644
--- a/arch/metag/kernel/signal.c
+++ b/arch/metag/kernel/signal.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 1991,1992  Linus Torvalds
  *  Copyright (C) 2005-2012  Imagination Technologies Ltd.
diff --git a/arch/metag/kernel/sys_metag.c b/arch/metag/kernel/sys_metag.c
index efe833a..27d9649 100644
--- a/arch/metag/kernel/sys_metag.c
+++ b/arch/metag/kernel/sys_metag.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file contains various random system calls that
  * have a non-standard calling sequence on the Linux/Meta
diff --git a/arch/metag/kernel/tbiunexp.S b/arch/metag/kernel/tbiunexp.S
index 907bbe0..2664808 100644
--- a/arch/metag/kernel/tbiunexp.S
+++ b/arch/metag/kernel/tbiunexp.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* Pass a breakpoint through to Codescape */
 
 #include <asm/tbx.h>
diff --git a/arch/metag/kernel/tcm.c b/arch/metag/kernel/tcm.c
index 5d102b3..1d7b4e3 100644
--- a/arch/metag/kernel/tcm.c
+++ b/arch/metag/kernel/tcm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2010 Imagination Technologies Ltd.
  */
diff --git a/arch/metag/kernel/time.c b/arch/metag/kernel/time.c
index f1c8c53..1e809e3 100644
--- a/arch/metag/kernel/time.c
+++ b/arch/metag/kernel/time.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2005-2013 Imagination Technologies Ltd.
  *
diff --git a/arch/metag/kernel/user_gateway.S b/arch/metag/kernel/user_gateway.S
index 7167f3e..7833fb8 100644
--- a/arch/metag/kernel/user_gateway.S
+++ b/arch/metag/kernel/user_gateway.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Copyright (C) 2010 Imagination Technologies Ltd.
  *
diff --git a/arch/metag/kernel/vmlinux.lds.S b/arch/metag/kernel/vmlinux.lds.S
index e6c700e..1efadae 100644
--- a/arch/metag/kernel/vmlinux.lds.S
+++ b/arch/metag/kernel/vmlinux.lds.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /* ld script to make Meta Linux kernel */
 
 #include <asm/thread_info.h>
diff --git a/arch/metag/lib/Makefile b/arch/metag/lib/Makefile
index a41d24e..3982850 100644
--- a/arch/metag/lib/Makefile
+++ b/arch/metag/lib/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for Meta-specific library files.
 #
diff --git a/arch/metag/lib/ashldi3.S b/arch/metag/lib/ashldi3.S
index 78d6974..5055df9e 100644
--- a/arch/metag/lib/ashldi3.S
+++ b/arch/metag/lib/ashldi3.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 by Imagination Technologies Ltd.
 !
 ! 64-bit arithmetic shift left routine.
diff --git a/arch/metag/lib/ashrdi3.S b/arch/metag/lib/ashrdi3.S
index 7cb7ed3..0c838fd 100644
--- a/arch/metag/lib/ashrdi3.S
+++ b/arch/metag/lib/ashrdi3.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 by Imagination Technologies Ltd.
 !
 ! 64-bit arithmetic shift right routine.
diff --git a/arch/metag/lib/clear_page.S b/arch/metag/lib/clear_page.S
index 43144ee..87756a5 100644
--- a/arch/metag/lib/clear_page.S
+++ b/arch/metag/lib/clear_page.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
         ! Copyright 2007,2008,2009 Imagination Technologies Ltd.
 
 #include <asm/page.h>
diff --git a/arch/metag/lib/cmpdi2.S b/arch/metag/lib/cmpdi2.S
index 9c5c663..ab70bd9 100644
--- a/arch/metag/lib/cmpdi2.S
+++ b/arch/metag/lib/cmpdi2.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 by Imagination Technologies Ltd.
 !
 ! 64-bit signed compare routine.
diff --git a/arch/metag/lib/copy_page.S b/arch/metag/lib/copy_page.S
index 91f7d46..abbc75e 100644
--- a/arch/metag/lib/copy_page.S
+++ b/arch/metag/lib/copy_page.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
         ! Copyright 2007,2008 Imagination Technologies Ltd.
 
 #include <asm/page.h>
diff --git a/arch/metag/lib/delay.c b/arch/metag/lib/delay.c
index 0b308f4..6754012 100644
--- a/arch/metag/lib/delay.c
+++ b/arch/metag/lib/delay.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *	Precise Delay Loops for Meta
  *
diff --git a/arch/metag/lib/div64.S b/arch/metag/lib/div64.S
index 1cfc934..55eece2 100644
--- a/arch/metag/lib/div64.S
+++ b/arch/metag/lib/div64.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 Imagination Technologies Ltd.
 !
 ! Signed/unsigned 64-bit division routines.
diff --git a/arch/metag/lib/divsi3.S b/arch/metag/lib/divsi3.S
index 11124cc..9e31abe 100644
--- a/arch/metag/lib/divsi3.S
+++ b/arch/metag/lib/divsi3.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
 !               Imagination Technologies Ltd
 !
diff --git a/arch/metag/lib/ip_fast_csum.S b/arch/metag/lib/ip_fast_csum.S
index 533b1e7..441f489 100644
--- a/arch/metag/lib/ip_fast_csum.S
+++ b/arch/metag/lib/ip_fast_csum.S
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 
 	.text
 /*
diff --git a/arch/metag/lib/lshrdi3.S b/arch/metag/lib/lshrdi3.S
index 47f7202..cf7ffc9 100644
--- a/arch/metag/lib/lshrdi3.S
+++ b/arch/metag/lib/lshrdi3.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 by Imagination Technologies Ltd.
 !
 ! 64-bit logical shift right routine.
diff --git a/arch/metag/lib/memcpy.S b/arch/metag/lib/memcpy.S
index 46b7a2b..c2e8395 100644
--- a/arch/metag/lib/memcpy.S
+++ b/arch/metag/lib/memcpy.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 !   Copyright (C) 2008-2012 Imagination Technologies Ltd.
 
 	.text
diff --git a/arch/metag/lib/memmove.S b/arch/metag/lib/memmove.S
index 228ea04..934abda 100644
--- a/arch/metag/lib/memmove.S
+++ b/arch/metag/lib/memmove.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 !   Copyright (C) 2008-2012 Imagination Technologies Ltd.
 
 	.text
diff --git a/arch/metag/lib/memset.S b/arch/metag/lib/memset.S
index 721085b..6ee246d 100644
--- a/arch/metag/lib/memset.S
+++ b/arch/metag/lib/memset.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 !   Copyright (C) 2008-2012 Imagination Technologies Ltd.
 
 	.text
diff --git a/arch/metag/lib/modsi3.S b/arch/metag/lib/modsi3.S
index 210cfa8..d65a2e5 100644
--- a/arch/metag/lib/modsi3.S
+++ b/arch/metag/lib/modsi3.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
 !               Imagination Technologies Ltd
 !
diff --git a/arch/metag/lib/muldi3.S b/arch/metag/lib/muldi3.S
index ee66ca8..9d10679 100644
--- a/arch/metag/lib/muldi3.S
+++ b/arch/metag/lib/muldi3.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 by Imagination Technologies Ltd.
 !
 ! 64-bit multiply routine.
diff --git a/arch/metag/lib/ucmpdi2.S b/arch/metag/lib/ucmpdi2.S
index 6f3347f..46f5686 100644
--- a/arch/metag/lib/ucmpdi2.S
+++ b/arch/metag/lib/ucmpdi2.S
@@ -1,3 +1,4 @@
+! SPDX-License-Identifier: GPL-2.0
 ! Copyright (C) 2012 by Imagination Technologies Ltd.
 !
 ! 64-bit unsigned compare routine.
diff --git a/arch/metag/lib/usercopy.c b/arch/metag/lib/usercopy.c
index c941abd..a48ef52 100644
--- a/arch/metag/lib/usercopy.c
+++ b/arch/metag/lib/usercopy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * User address space access functions.
  * The non-inlined parts of asm-metag/uaccess.h are here.
diff --git a/arch/metag/mm/Kconfig b/arch/metag/mm/Kconfig
index 03fb8f1..9d4b2c6 100644
--- a/arch/metag/mm/Kconfig
+++ b/arch/metag/mm/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 menu "Memory management options"
 
 config PAGE_OFFSET
diff --git a/arch/metag/mm/Makefile b/arch/metag/mm/Makefile
index 9943311..0c7c91b 100644
--- a/arch/metag/mm/Makefile
+++ b/arch/metag/mm/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the linux Meta-specific parts of the memory manager.
 #
diff --git a/arch/metag/mm/extable.c b/arch/metag/mm/extable.c
index 3aa90b7..9b92d3a 100644
--- a/arch/metag/mm/extable.c
+++ b/arch/metag/mm/extable.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/extable.h>
 #include <linux/uaccess.h>
 
diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c
index 5055477..de54fe6 100644
--- a/arch/metag/mm/fault.c
+++ b/arch/metag/mm/fault.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Meta page fault handling.
  *
diff --git a/arch/metag/mm/highmem.c b/arch/metag/mm/highmem.c
index f19a87f..83527fc 100644
--- a/arch/metag/mm/highmem.c
+++ b/arch/metag/mm/highmem.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/export.h>
 #include <linux/highmem.h>
 #include <linux/sched.h>
diff --git a/arch/metag/mm/hugetlbpage.c b/arch/metag/mm/hugetlbpage.c
index 67fd53e..012ee4c 100644
--- a/arch/metag/mm/hugetlbpage.c
+++ b/arch/metag/mm/hugetlbpage.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * arch/metag/mm/hugetlbpage.c
  *
diff --git a/arch/metag/mm/init.c b/arch/metag/mm/init.c
index 188d4d9..0e2ca90 100644
--- a/arch/metag/mm/init.c
+++ b/arch/metag/mm/init.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2005,2006,2007,2008,2009,2010 Imagination Technologies
  *
diff --git a/arch/metag/mm/ioremap.c b/arch/metag/mm/ioremap.c
index a136a43..df2b59c 100644
--- a/arch/metag/mm/ioremap.c
+++ b/arch/metag/mm/ioremap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Re-map IO memory to kernel address space so that we can access it.
  * Needed for memory-mapped I/O devices mapped outside our normal DRAM
diff --git a/arch/metag/mm/l2cache.c b/arch/metag/mm/l2cache.c
index c64ee61..addffc5 100644
--- a/arch/metag/mm/l2cache.c
+++ b/arch/metag/mm/l2cache.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
diff --git a/arch/metag/mm/maccess.c b/arch/metag/mm/maccess.c
index eba2cfc..c227551 100644
--- a/arch/metag/mm/maccess.c
+++ b/arch/metag/mm/maccess.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * safe read and write memory routines callable while atomic
  *
diff --git a/arch/metag/mm/mmu-meta1.c b/arch/metag/mm/mmu-meta1.c
index 62ebab9..53190b1 100644
--- a/arch/metag/mm/mmu-meta1.c
+++ b/arch/metag/mm/mmu-meta1.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2005,2006,2007,2008,2009 Imagination Technologies
  *
diff --git a/arch/metag/mm/mmu-meta2.c b/arch/metag/mm/mmu-meta2.c
index 81dcbb0..8b668a6 100644
--- a/arch/metag/mm/mmu-meta2.c
+++ b/arch/metag/mm/mmu-meta2.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2008,2009,2010,2011 Imagination Technologies Ltd.
  *
diff --git a/arch/metag/oprofile/Makefile b/arch/metag/oprofile/Makefile
index c9639d4..dc92a4a 100644
--- a/arch/metag/oprofile/Makefile
+++ b/arch/metag/oprofile/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_OPROFILE)	+= oprofile.o
 
 oprofile-core-y	+= buffer_sync.o
diff --git a/arch/metag/oprofile/backtrace.h b/arch/metag/oprofile/backtrace.h
index c0fcc42..60adb86 100644
--- a/arch/metag/oprofile/backtrace.h
+++ b/arch/metag/oprofile/backtrace.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METAG_OPROFILE_BACKTRACE_H
 #define _METAG_OPROFILE_BACKTRACE_H
 
diff --git a/arch/metag/tbx/Makefile b/arch/metag/tbx/Makefile
index e994239..98bc545 100644
--- a/arch/metag/tbx/Makefile
+++ b/arch/metag/tbx/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for TBX library files..
 #