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arm64/neon: add workaround for ambiguous C99 stdint.h types

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In a way similar to ARM commit 09096f6a0e ("ARM: 7822/1: add workaround
for ambiguous C99 stdint.h types"), this patch redefines the macros that
are used in stdint.h so its definitions of uint64_t and int64_t are
compatible with those of the kernel.

This patch comes from: https://patchwork.kernel.org/patch/3540001/
Wrote by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

We mark this file as a private file and don't have to override asm/types.h

Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Jackie Liu 2018-12-04 09:43:22 +08:00 committed by Will Deacon
parent 8cb3451b1f
commit 21e28547f6
1 changed files with 39 additions and 0 deletions
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39
arch/arm64/include/asm/neon-intrinsics.h Normal file
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/*
* Copyright (C) 2018 Linaro, Ltd. <ard.biesheuvel@linaro.org>
*
* 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
* published by the Free Software Foundation.
*/
#ifndef __ASM_NEON_INTRINSICS_H
#define __ASM_NEON_INTRINSICS_H
#include <asm-generic/int-ll64.h>
/*
* In the kernel, u64/s64 are [un]signed long long, not [un]signed long.
* So by redefining these macros to the former, we can force gcc-stdint.h
* to define uint64_t / in64_t in a compatible manner.
*/
#ifdef __INT64_TYPE__
#undef __INT64_TYPE__
#define __INT64_TYPE__ long long
#endif
#ifdef __UINT64_TYPE__
#undef __UINT64_TYPE__
#define __UINT64_TYPE__ unsigned long long
#endif
/*
* genksyms chokes on the ARM NEON instrinsics system header, but we
* don't export anything it defines anyway, so just disregard when
* genksyms execute.
*/
#ifndef __GENKSYMS__
#include <arm_neon.h>
#endif
#endif /* __ASM_NEON_INTRINSICS_H */