diff options
Diffstat (limited to 'arch/arm/lib/xor-neon.c')
| -rw-r--r-- | arch/arm/lib/xor-neon.c | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/arch/arm/lib/xor-neon.c b/arch/arm/lib/xor-neon.c index 2c40aeab3eaa..cf57fca97908 100644 --- a/arch/arm/lib/xor-neon.c +++ b/arch/arm/lib/xor-neon.c @@ -1,36 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/arch/arm/lib/xor-neon.c * * Copyright (C) 2013 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. */ #include <linux/raid/xor.h> #include <linux/module.h> +MODULE_DESCRIPTION("NEON accelerated XOR implementation"); MODULE_LICENSE("GPL"); #ifndef __ARM_NEON__ -#error You should compile this file with '-mfloat-abi=softfp -mfpu=neon' +#error You should compile this file with '-march=armv7-a -mfloat-abi=softfp -mfpu=neon' #endif /* * Pull in the reference implementations while instructing GCC (through * -ftree-vectorize) to attempt to exploit implicit parallelism and emit - * NEON instructions. + * NEON instructions. Clang does this by default at O2 so no pragma is + * needed. */ -#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) +#ifdef CONFIG_CC_IS_GCC #pragma GCC optimize "tree-vectorize" -#else -/* - * While older versions of GCC do not generate incorrect code, they fail to - * recognize the parallel nature of these functions, and emit plain ARM code, - * which is known to be slower than the optimized ARM code in asm-arm/xor.h. - */ -#warning This code requires at least version 4.6 of GCC #endif #pragma GCC diagnostic ignored "-Wunused-variable" |