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-rw-r--r--tools/lib/api/Makefile1
-rw-r--r--tools/lib/api/cpu.c1
-rw-r--r--tools/lib/api/cpu.h1
-rw-r--r--tools/lib/api/debug-internal.h1
-rw-r--r--tools/lib/api/debug.c1
-rw-r--r--tools/lib/api/debug.h1
-rw-r--r--tools/lib/api/fd/array.h1
-rw-r--r--tools/lib/api/fs/fs.c1
-rw-r--r--tools/lib/api/fs/fs.h1
-rw-r--r--tools/lib/api/fs/tracing_path.c1
-rw-r--r--tools/lib/api/fs/tracing_path.h1
-rw-r--r--tools/lib/bpf/Makefile1
-rw-r--r--tools/lib/hweight.c1
-rw-r--r--tools/lib/lockdep/Makefile1
-rw-r--r--tools/lib/lockdep/common.c1
-rw-r--r--tools/lib/lockdep/include/liblockdep/common.h1
-rw-r--r--tools/lib/lockdep/include/liblockdep/mutex.h1
-rw-r--r--tools/lib/lockdep/include/liblockdep/rwlock.h1
-rw-r--r--tools/lib/lockdep/lockdep.c1
-rw-r--r--tools/lib/lockdep/preload.c1
-rwxr-xr-xtools/lib/lockdep/run_tests.sh1
-rw-r--r--tools/lib/lockdep/tests/AA.c1
-rw-r--r--tools/lib/lockdep/tests/ABA.c1
-rw-r--r--tools/lib/lockdep/tests/ABBA.c1
-rw-r--r--tools/lib/lockdep/tests/ABBA_2threads.c1
-rw-r--r--tools/lib/lockdep/tests/ABBCCA.c1
-rw-r--r--tools/lib/lockdep/tests/ABBCCDDA.c1
-rw-r--r--tools/lib/lockdep/tests/ABCABC.c1
-rw-r--r--tools/lib/lockdep/tests/ABCDBCDA.c1
-rw-r--r--tools/lib/lockdep/tests/ABCDBDDA.c1
-rw-r--r--tools/lib/lockdep/tests/WW.c1
-rw-r--r--tools/lib/lockdep/tests/common.h1
-rw-r--r--tools/lib/lockdep/tests/unlock_balance.c1
-rw-r--r--tools/lib/str_error_r.c1
-rw-r--r--tools/lib/string.c1
-rw-r--r--tools/lib/subcmd/Makefile1
-rw-r--r--tools/lib/subcmd/exec-cmd.c1
-rw-r--r--tools/lib/subcmd/exec-cmd.h1
-rw-r--r--tools/lib/subcmd/help.c1
-rw-r--r--tools/lib/subcmd/help.h1
-rw-r--r--tools/lib/subcmd/pager.c1
-rw-r--r--tools/lib/subcmd/pager.h1
-rw-r--r--tools/lib/subcmd/parse-options.c1
-rw-r--r--tools/lib/subcmd/parse-options.h1
-rw-r--r--tools/lib/subcmd/run-command.c1
-rw-r--r--tools/lib/subcmd/run-command.h1
-rw-r--r--tools/lib/subcmd/sigchain.c1
-rw-r--r--tools/lib/subcmd/sigchain.h1
-rw-r--r--tools/lib/subcmd/subcmd-config.c1
-rw-r--r--tools/lib/subcmd/subcmd-config.h1
-rw-r--r--tools/lib/subcmd/subcmd-util.h1
-rw-r--r--tools/lib/symbol/kallsyms.c1
-rw-r--r--tools/lib/symbol/kallsyms.h1
-rw-r--r--tools/lib/traceevent/Makefile1
-rw-r--r--tools/lib/traceevent/plugin_cfg80211.c1
-rw-r--r--tools/lib/traceevent/plugin_scsi.c1
-rw-r--r--tools/lib/traceevent/plugin_xen.c1
-rw-r--r--tools/lib/vsprintf.c1
58 files changed, 58 insertions, 0 deletions
diff --git a/tools/lib/api/Makefile b/tools/lib/api/Makefile
index 1e83e3c074484..a13e9c7f1fc50 100644
--- a/tools/lib/api/Makefile
+++ b/tools/lib/api/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
include ../../scripts/Makefile.include
include ../../scripts/utilities.mak # QUIET_CLEAN
diff --git a/tools/lib/api/cpu.c b/tools/lib/api/cpu.c
index 8c6489356e3ac..4af6d4b7aa075 100644
--- a/tools/lib/api/cpu.c
+++ b/tools/lib/api/cpu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include "cpu.h"
diff --git a/tools/lib/api/cpu.h b/tools/lib/api/cpu.h
index 81e9d3955961e..90a102fb20ded 100644
--- a/tools/lib/api/cpu.h
+++ b/tools/lib/api/cpu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_CPU__
#define __API_CPU__
diff --git a/tools/lib/api/debug-internal.h b/tools/lib/api/debug-internal.h
index 188f7880eafe6..80c783497d25b 100644
--- a/tools/lib/api/debug-internal.h
+++ b/tools/lib/api/debug-internal.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_DEBUG_INTERNAL_H__
#define __API_DEBUG_INTERNAL_H__
diff --git a/tools/lib/api/debug.c b/tools/lib/api/debug.c
index 5fa5cf500a1f9..69b1ba3d1ee38 100644
--- a/tools/lib/api/debug.c
+++ b/tools/lib/api/debug.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdarg.h>
#include "debug.h"
diff --git a/tools/lib/api/debug.h b/tools/lib/api/debug.h
index a0872f68fc56b..3684dd6e0c02d 100644
--- a/tools/lib/api/debug.h
+++ b/tools/lib/api/debug.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_DEBUG_H__
#define __API_DEBUG_H__
diff --git a/tools/lib/api/fd/array.h b/tools/lib/api/fd/array.h
index 71287dddc05fb..b39557d1a88f9 100644
--- a/tools/lib/api/fd/array.h
+++ b/tools/lib/api/fd/array.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_FD_ARRAY__
#define __API_FD_ARRAY__
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index a7ecf8f469f47..b24afc0e6e81c 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <ctype.h>
#include <errno.h>
#include <limits.h>
diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h
index 45605348461e2..dda49deefb521 100644
--- a/tools/lib/api/fs/fs.h
+++ b/tools/lib/api/fs/fs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_FS__
#define __API_FS__
diff --git a/tools/lib/api/fs/tracing_path.c b/tools/lib/api/fs/tracing_path.c
index 3e606b9c443ef..7b7fd0b185510 100644
--- a/tools/lib/api/fs/tracing_path.c
+++ b/tools/lib/api/fs/tracing_path.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
diff --git a/tools/lib/api/fs/tracing_path.h b/tools/lib/api/fs/tracing_path.h
index 3f233ac70b6f7..0066f06cc3817 100644
--- a/tools/lib/api/fs/tracing_path.h
+++ b/tools/lib/api/fs/tracing_path.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __API_FS_TRACING_PATH_H
#define __API_FS_TRACING_PATH_H
diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
index d2441db34740d..4555304dc18e6 100644
--- a/tools/lib/bpf/Makefile
+++ b/tools/lib/bpf/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
# Most of this file is copied from tools/lib/traceevent/Makefile
BPF_VERSION = 0
diff --git a/tools/lib/hweight.c b/tools/lib/hweight.c
index 0b859b8843390..a16ebf5154170 100644
--- a/tools/lib/hweight.c
+++ b/tools/lib/hweight.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/bitops.h>
#include <asm/types.h>
diff --git a/tools/lib/lockdep/Makefile b/tools/lib/lockdep/Makefile
index ed9ace59d1120..9b0ca3ad1ef38 100644
--- a/tools/lib/lockdep/Makefile
+++ b/tools/lib/lockdep/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
# file format version
FILE_VERSION = 1
diff --git a/tools/lib/lockdep/common.c b/tools/lib/lockdep/common.c
index d1c89cc06f5f6..5c3b58cce8a9b 100644
--- a/tools/lib/lockdep/common.c
+++ b/tools/lib/lockdep/common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stddef.h>
#include <stdbool.h>
#include <linux/compiler.h>
diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h
index 6e66277ec4375..8862da80995a8 100644
--- a/tools/lib/lockdep/include/liblockdep/common.h
+++ b/tools/lib/lockdep/include/liblockdep/common.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIBLOCKDEP_COMMON_H
#define _LIBLOCKDEP_COMMON_H
diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h
index ee53a42818cae..a80ac39f966ed 100644
--- a/tools/lib/lockdep/include/liblockdep/mutex.h
+++ b/tools/lib/lockdep/include/liblockdep/mutex.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIBLOCKDEP_MUTEX_H
#define _LIBLOCKDEP_MUTEX_H
diff --git a/tools/lib/lockdep/include/liblockdep/rwlock.h b/tools/lib/lockdep/include/liblockdep/rwlock.h
index 4ec03f8615516..a96c3bf0fef12 100644
--- a/tools/lib/lockdep/include/liblockdep/rwlock.h
+++ b/tools/lib/lockdep/include/liblockdep/rwlock.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIBLOCKDEP_RWLOCK_H
#define _LIBLOCKDEP_RWLOCK_H
diff --git a/tools/lib/lockdep/lockdep.c b/tools/lib/lockdep/lockdep.c
index ced6d7443cea2..6002fcf2f9bc3 100644
--- a/tools/lib/lockdep/lockdep.c
+++ b/tools/lib/lockdep/lockdep.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/lockdep.h>
#include <stdlib.h>
diff --git a/tools/lib/lockdep/preload.c b/tools/lib/lockdep/preload.c
index 6a2d3c5d4e92b..76245d16196de 100644
--- a/tools/lib/lockdep/preload.c
+++ b/tools/lib/lockdep/preload.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <pthread.h>
#include <stdio.h>
diff --git a/tools/lib/lockdep/run_tests.sh b/tools/lib/lockdep/run_tests.sh
index f9b94098fc98e..2e570a188f167 100755
--- a/tools/lib/lockdep/run_tests.sh
+++ b/tools/lib/lockdep/run_tests.sh
@@ -1,4 +1,5 @@
#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
make &> /dev/null
diff --git a/tools/lib/lockdep/tests/AA.c b/tools/lib/lockdep/tests/AA.c
index 18211a5f354fe..63c7ce97bda3a 100644
--- a/tools/lib/lockdep/tests/AA.c
+++ b/tools/lib/lockdep/tests/AA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
int main(void)
diff --git a/tools/lib/lockdep/tests/ABA.c b/tools/lib/lockdep/tests/ABA.c
index 0f782ff404ac6..efa39b23f05d0 100644
--- a/tools/lib/lockdep/tests/ABA.c
+++ b/tools/lib/lockdep/tests/ABA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
void main(void)
diff --git a/tools/lib/lockdep/tests/ABBA.c b/tools/lib/lockdep/tests/ABBA.c
index 07f0e29d54859..1460afd33d712 100644
--- a/tools/lib/lockdep/tests/ABBA.c
+++ b/tools/lib/lockdep/tests/ABBA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"
diff --git a/tools/lib/lockdep/tests/ABBA_2threads.c b/tools/lib/lockdep/tests/ABBA_2threads.c
index cd807d7363611..39325ef8a2ac1 100644
--- a/tools/lib/lockdep/tests/ABBA_2threads.c
+++ b/tools/lib/lockdep/tests/ABBA_2threads.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <pthread.h>
diff --git a/tools/lib/lockdep/tests/ABBCCA.c b/tools/lib/lockdep/tests/ABBCCA.c
index 843db09ac666c..a54c1b2af1182 100644
--- a/tools/lib/lockdep/tests/ABBCCA.c
+++ b/tools/lib/lockdep/tests/ABBCCA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"
diff --git a/tools/lib/lockdep/tests/ABBCCDDA.c b/tools/lib/lockdep/tests/ABBCCDDA.c
index 33620e268f85f..aa5d194e88694 100644
--- a/tools/lib/lockdep/tests/ABBCCDDA.c
+++ b/tools/lib/lockdep/tests/ABBCCDDA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"
diff --git a/tools/lib/lockdep/tests/ABCABC.c b/tools/lib/lockdep/tests/ABCABC.c
index 3fee51e3a68a5..b54a08e60416f 100644
--- a/tools/lib/lockdep/tests/ABCABC.c
+++ b/tools/lib/lockdep/tests/ABCABC.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"
diff --git a/tools/lib/lockdep/tests/ABCDBCDA.c b/tools/lib/lockdep/tests/ABCDBCDA.c
index 427ba562c75b0..a56742250d86f 100644
--- a/tools/lib/lockdep/tests/ABCDBCDA.c
+++ b/tools/lib/lockdep/tests/ABCDBCDA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"
diff --git a/tools/lib/lockdep/tests/ABCDBDDA.c b/tools/lib/lockdep/tests/ABCDBDDA.c
index 680c6cf3e919c..238a3353f3c35 100644
--- a/tools/lib/lockdep/tests/ABCDBDDA.c
+++ b/tools/lib/lockdep/tests/ABCDBDDA.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
#include "common.h"
diff --git a/tools/lib/lockdep/tests/WW.c b/tools/lib/lockdep/tests/WW.c
index d44f77d710298..eee88df7fc41b 100644
--- a/tools/lib/lockdep/tests/WW.c
+++ b/tools/lib/lockdep/tests/WW.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/rwlock.h>
void main(void)
diff --git a/tools/lib/lockdep/tests/common.h b/tools/lib/lockdep/tests/common.h
index d89e94d47d86c..3026c29ccb5c3 100644
--- a/tools/lib/lockdep/tests/common.h
+++ b/tools/lib/lockdep/tests/common.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LIBLOCKDEP_TEST_COMMON_H
#define _LIBLOCKDEP_TEST_COMMON_H
diff --git a/tools/lib/lockdep/tests/unlock_balance.c b/tools/lib/lockdep/tests/unlock_balance.c
index 0bc62de686f7b..34cf32f689de0 100644
--- a/tools/lib/lockdep/tests/unlock_balance.c
+++ b/tools/lib/lockdep/tests/unlock_balance.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <liblockdep/mutex.h>
void main(void)
diff --git a/tools/lib/str_error_r.c b/tools/lib/str_error_r.c
index 503ae072244cb..d6d65537b0d9b 100644
--- a/tools/lib/str_error_r.c
+++ b/tools/lib/str_error_r.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#undef _GNU_SOURCE
#include <string.h>
#include <stdio.h>
diff --git a/tools/lib/string.c b/tools/lib/string.c
index a4246f14ded10..93b3d4b6feac3 100644
--- a/tools/lib/string.c
+++ b/tools/lib/string.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* linux/tools/lib/string.c
*
diff --git a/tools/lib/subcmd/Makefile b/tools/lib/subcmd/Makefile
index 7e9f03c97e4c6..95563b8e1ad74 100644
--- a/tools/lib/subcmd/Makefile
+++ b/tools/lib/subcmd/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
include ../../scripts/Makefile.include
include ../../scripts/utilities.mak # QUIET_CLEAN
diff --git a/tools/lib/subcmd/exec-cmd.c b/tools/lib/subcmd/exec-cmd.c
index 1ae833af1a4af..33e94fb839867 100644
--- a/tools/lib/subcmd/exec-cmd.c
+++ b/tools/lib/subcmd/exec-cmd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/string.h>
#include <sys/types.h>
diff --git a/tools/lib/subcmd/exec-cmd.h b/tools/lib/subcmd/exec-cmd.h
index 5d08bda31d90f..aba591b8d2548 100644
--- a/tools/lib/subcmd/exec-cmd.h
+++ b/tools/lib/subcmd/exec-cmd.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_EXEC_CMD_H
#define __SUBCMD_EXEC_CMD_H
diff --git a/tools/lib/subcmd/help.c b/tools/lib/subcmd/help.c
index 0310520f918e4..2859f107abc80 100644
--- a/tools/lib/subcmd/help.c
+++ b/tools/lib/subcmd/help.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
diff --git a/tools/lib/subcmd/help.h b/tools/lib/subcmd/help.h
index 9bd4223dc7220..355c066c8d49c 100644
--- a/tools/lib/subcmd/help.h
+++ b/tools/lib/subcmd/help.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_HELP_H
#define __SUBCMD_HELP_H
diff --git a/tools/lib/subcmd/pager.c b/tools/lib/subcmd/pager.c
index 6518bea926d6f..5ba754d179520 100644
--- a/tools/lib/subcmd/pager.c
+++ b/tools/lib/subcmd/pager.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <sys/select.h>
#include <stdlib.h>
#include <stdio.h>
diff --git a/tools/lib/subcmd/pager.h b/tools/lib/subcmd/pager.h
index 623f5542d05de..f1a53cf298804 100644
--- a/tools/lib/subcmd/pager.h
+++ b/tools/lib/subcmd/pager.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_PAGER_H
#define __SUBCMD_PAGER_H
diff --git a/tools/lib/subcmd/parse-options.c b/tools/lib/subcmd/parse-options.c
index 2bd6fd0c1d40d..f6a1babcbac41 100644
--- a/tools/lib/subcmd/parse-options.c
+++ b/tools/lib/subcmd/parse-options.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/string.h>
#include <linux/types.h>
diff --git a/tools/lib/subcmd/parse-options.h b/tools/lib/subcmd/parse-options.h
index f054ca1b899df..92fdbe1519f6d 100644
--- a/tools/lib/subcmd/parse-options.h
+++ b/tools/lib/subcmd/parse-options.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_PARSE_OPTIONS_H
#define __SUBCMD_PARSE_OPTIONS_H
diff --git a/tools/lib/subcmd/run-command.c b/tools/lib/subcmd/run-command.c
index 911f83942723a..5cdac21625322 100644
--- a/tools/lib/subcmd/run-command.c
+++ b/tools/lib/subcmd/run-command.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
diff --git a/tools/lib/subcmd/run-command.h b/tools/lib/subcmd/run-command.h
index fe2befea1e730..17d969c6add3b 100644
--- a/tools/lib/subcmd/run-command.h
+++ b/tools/lib/subcmd/run-command.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_RUN_COMMAND_H
#define __SUBCMD_RUN_COMMAND_H
diff --git a/tools/lib/subcmd/sigchain.c b/tools/lib/subcmd/sigchain.c
index 3537c348a18ef..f0fe3dbef7f7f 100644
--- a/tools/lib/subcmd/sigchain.c
+++ b/tools/lib/subcmd/sigchain.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <signal.h>
#include "subcmd-util.h"
#include "sigchain.h"
diff --git a/tools/lib/subcmd/sigchain.h b/tools/lib/subcmd/sigchain.h
index 0c919f2874ca3..1ec663af43eaf 100644
--- a/tools/lib/subcmd/sigchain.h
+++ b/tools/lib/subcmd/sigchain.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_SIGCHAIN_H
#define __SUBCMD_SIGCHAIN_H
diff --git a/tools/lib/subcmd/subcmd-config.c b/tools/lib/subcmd/subcmd-config.c
index d017c728bd1b3..84a7cf6c7878a 100644
--- a/tools/lib/subcmd/subcmd-config.c
+++ b/tools/lib/subcmd/subcmd-config.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include "subcmd-config.h"
#define UNDEFINED "SUBCMD_HAS_NOT_BEEN_INITIALIZED"
diff --git a/tools/lib/subcmd/subcmd-config.h b/tools/lib/subcmd/subcmd-config.h
index cc8514030b5c3..9024dc17d1001 100644
--- a/tools/lib/subcmd/subcmd-config.h
+++ b/tools/lib/subcmd/subcmd-config.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_SUBCMD_CONFIG_H
#define __PERF_SUBCMD_CONFIG_H
diff --git a/tools/lib/subcmd/subcmd-util.h b/tools/lib/subcmd/subcmd-util.h
index 8fa5f036eff08..794a375dad360 100644
--- a/tools/lib/subcmd/subcmd-util.h
+++ b/tools/lib/subcmd/subcmd-util.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SUBCMD_UTIL_H
#define __SUBCMD_UTIL_H
diff --git a/tools/lib/symbol/kallsyms.c b/tools/lib/symbol/kallsyms.c
index d270ac00613d6..914cb8e3d40b7 100644
--- a/tools/lib/symbol/kallsyms.c
+++ b/tools/lib/symbol/kallsyms.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <ctype.h>
#include "symbol/kallsyms.h"
#include <stdio.h>
diff --git a/tools/lib/symbol/kallsyms.h b/tools/lib/symbol/kallsyms.h
index 4071316a766ef..bc40101d72c18 100644
--- a/tools/lib/symbol/kallsyms.h
+++ b/tools/lib/symbol/kallsyms.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __TOOLS_KALLSYMS_H_
#define __TOOLS_KALLSYMS_H_ 1
diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 9b8555ea3459c..46cd5f871ad76 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
# trace-cmd version
EP_VERSION = 1
EP_PATCHLEVEL = 1
diff --git a/tools/lib/traceevent/plugin_cfg80211.c b/tools/lib/traceevent/plugin_cfg80211.c
index ec57d0c1fbc2b..8f8586912da7b 100644
--- a/tools/lib/traceevent/plugin_cfg80211.c
+++ b/tools/lib/traceevent/plugin_cfg80211.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
diff --git a/tools/lib/traceevent/plugin_scsi.c b/tools/lib/traceevent/plugin_scsi.c
index 3727de48c8d50..5e750af2b461f 100644
--- a/tools/lib/traceevent/plugin_scsi.c
+++ b/tools/lib/traceevent/plugin_scsi.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
diff --git a/tools/lib/traceevent/plugin_xen.c b/tools/lib/traceevent/plugin_xen.c
index 3a413eaada684..690173bfa13ed 100644
--- a/tools/lib/traceevent/plugin_xen.c
+++ b/tools/lib/traceevent/plugin_xen.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
diff --git a/tools/lib/vsprintf.c b/tools/lib/vsprintf.c
index 45f9a06daa560..e08ee147eab43 100644
--- a/tools/lib/vsprintf.c
+++ b/tools/lib/vsprintf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <sys/types.h>
#include <linux/kernel.h>
#include <stdio.h>