Copyright:
Copyright (C) 2019, 2021 Namjae Jeon <linkinjeon@kernel.org>
+ Copyright (C) 2021 LG Electronics
Copyright (C) 2020 Hyunchul Lee <hyc.lee@gmail.com>
Copyright (C) 2020 The Android Open Source Project
Copyright (C) 1989-2018 Free Software Foundation, Inc.