License cleanup: add SPDX license identifier to uapi header files with a license

Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be.  This makes it hard for
compliance tools to determine the correct license.

Update these files with an SPDX license identifier.  The identifier was
chosen based on the license information in the file.

GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:

   NOTE! This copyright does *not* cover user programs that use kernel
   services by normal system calls - this is merely considered normal use
   of the kernel, and does *not* fall under the heading of "derived work".

This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.

Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier.  The format
is:
        ((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)

SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text.  The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.  See the previous patch in this series for the
methodology of how this patch was researched.

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>

arch/powerpc/include/uapi/asm/byteorder.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_BYTEORDER_H
 #define _ASM_POWERPC_BYTEORDER_H
 

arch/powerpc/include/uapi/asm/eeh.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2, as

arch/powerpc/include/uapi/asm/elf.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * ELF register definitions..
  *

arch/powerpc/include/uapi/asm/epapr_hcalls.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) */
 /*
  * ePAPR hcall interface
  *

arch/powerpc/include/uapi/asm/ipcbuf.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_IPCBUF_H
 #define _ASM_POWERPC_IPCBUF_H
 

arch/powerpc/include/uapi/asm/kvm.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2, as

arch/powerpc/include/uapi/asm/kvm_para.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2, as

arch/powerpc/include/uapi/asm/mman.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

arch/powerpc/include/uapi/asm/nvram.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * NVRAM definitions and access functions.
  *

arch/powerpc/include/uapi/asm/opal-prd.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * OPAL Runtime Diagnostics interface driver
  * Supported on POWERNV platform

arch/powerpc/include/uapi/asm/perf_event.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * Copyright 2013 Michael Ellerman, IBM Corp.
  *

arch/powerpc/include/uapi/asm/ps3fb.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * Copyright (C) 2006 Sony Computer Entertainment Inc.
  * Copyright 2006, 2007 Sony Corporation

arch/powerpc/include/uapi/asm/ptrace.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * Copyright (C) 2001 PPC64 Team, IBM Corp
  *

arch/powerpc/include/uapi/asm/sembuf.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_SEMBUF_H
 #define _ASM_POWERPC_SEMBUF_H
 

arch/powerpc/include/uapi/asm/shmbuf.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_SHMBUF_H
 #define _ASM_POWERPC_SHMBUF_H
 

arch/powerpc/include/uapi/asm/sigcontext.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_SIGCONTEXT_H
 #define _ASM_POWERPC_SIGCONTEXT_H
 

arch/powerpc/include/uapi/asm/siginfo.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_SIGINFO_H
 #define _ASM_POWERPC_SIGINFO_H
 

arch/powerpc/include/uapi/asm/socket.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_SOCKET_H
 #define _ASM_POWERPC_SOCKET_H
 

arch/powerpc/include/uapi/asm/spu_info.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * SPU info structures
  *

arch/powerpc/include/uapi/asm/stat.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_STAT_H
 #define _ASM_POWERPC_STAT_H
 /*

arch/powerpc/include/uapi/asm/swab.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License

arch/powerpc/include/uapi/asm/termbits.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 #ifndef _ASM_POWERPC_TERMBITS_H
 #define _ASM_POWERPC_TERMBITS_H
 

arch/powerpc/include/uapi/asm/termios.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * Liberally adapted from alpha/termios.h.  In particular, the c_cc[]
  * fields have been reordered so that termio & termios share the

arch/powerpc/include/uapi/asm/types.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * This file is never included by application software unless
  * explicitly requested (e.g., via linux/types.h) in which case the

arch/powerpc/include/uapi/asm/unistd.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  * This file contains the system call numbers.
  *