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Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
34 lines
1.0 KiB
C
34 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/arm/include/asm/neon.h
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*
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* Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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#include <asm/hwcap.h>
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#define cpu_has_neon() (!!(elf_hwcap & HWCAP_NEON))
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#ifdef __ARM_NEON__
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/*
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* If you are affected by the BUILD_BUG below, it probably means that you are
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* using NEON code /and/ calling the kernel_neon_begin() function from the same
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* compilation unit. To prevent issues that may arise from GCC reordering or
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* generating(1) NEON instructions outside of these begin/end functions, the
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* only supported way of using NEON code in the kernel is by isolating it in a
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* separate compilation unit, and calling it from another unit from inside a
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* kernel_neon_begin/kernel_neon_end pair.
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*
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* (1) Current GCC (4.7) might generate NEON instructions at O3 level if
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* -mpfu=neon is set.
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*/
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#define kernel_neon_begin() \
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BUILD_BUG_ON_MSG(1, "kernel_neon_begin() called from NEON code")
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#else
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void kernel_neon_begin(void);
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#endif
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void kernel_neon_end(void);
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