e2be04c7f9
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>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 99, 2003 by Ralf Baechle
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*/
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#ifndef _ASM_SWAB_H
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#define _ASM_SWAB_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#define __SWAB_64_THRU_32__
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#if !defined(__mips16) && \
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((defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \
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defined(_MIPS_ARCH_LOONGSON3A))
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static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
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{
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__asm__(
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" .set push \n"
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" .set arch=mips32r2 \n"
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" wsbh %0, %1 \n"
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" .set pop \n"
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: "=r" (x)
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: "r" (x));
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return x;
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}
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#define __arch_swab16 __arch_swab16
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static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
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{
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__asm__(
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" .set push \n"
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" .set arch=mips32r2 \n"
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" wsbh %0, %1 \n"
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" rotr %0, %0, 16 \n"
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" .set pop \n"
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: "=r" (x)
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: "r" (x));
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return x;
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}
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#define __arch_swab32 __arch_swab32
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/*
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* Having already checked for MIPS R2, enable the optimized version for
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* 64-bit kernel on r2 CPUs.
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*/
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#ifdef __mips64
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static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
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{
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__asm__(
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" .set push \n"
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" .set arch=mips64r2 \n"
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" dsbh %0, %1 \n"
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" dshd %0, %0 \n"
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" .set pop \n"
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: "=r" (x)
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: "r" (x));
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return x;
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}
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#define __arch_swab64 __arch_swab64
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#endif /* __mips64 */
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#endif /* (not __mips16) and (MIPS R2 or newer or Loongson 3A) */
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#endif /* _ASM_SWAB_H */
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