cregit-Linux how code gets into the kernel

Release 4.8 lib/raid6/x86.h

Directory: lib/raid6
/* ----------------------------------------------------------------------- *
 *
 *   Copyright 2002-2004 H. Peter Anvin - All Rights Reserved
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
 *   Boston MA 02111-1307, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

/*
 * raid6/x86.h
 *
 * Definitions common to x86 and x86-64 RAID-6 code only
 */

#ifndef LINUX_RAID_RAID6X86_H

#define LINUX_RAID_RAID6X86_H

#if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)

#ifdef __KERNEL__ /* Real code */

#include <asm/fpu/api.h>

#else /* Dummy code for user space testing */


static inline void kernel_fpu_begin(void) { }

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PersonTokensPropCommitsCommitProp
andrew mortonandrew morton675.00%150.00%
h. peter anvinh. peter anvin225.00%150.00%
Total8100.00%2100.00%


static inline void kernel_fpu_end(void) { }

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andrew mortonandrew morton675.00%150.00%
h. peter anvinh. peter anvin225.00%150.00%
Total8100.00%2100.00%

#define __aligned(x) __attribute__((aligned(x))) #define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */ #define X86_FEATURE_FXSR (0*32+24) /* FXSAVE and FXRSTOR instructions * (fast save and restore) */ #define X86_FEATURE_XMM (0*32+25) /* Streaming SIMD Extensions */ #define X86_FEATURE_XMM2 (0*32+26) /* Streaming SIMD Extensions-2 */ #define X86_FEATURE_XMM3 (4*32+ 0) /* "pni" SSE-3 */ #define X86_FEATURE_SSSE3 (4*32+ 9) /* Supplemental SSE-3 */ #define X86_FEATURE_AVX (4*32+28) /* Advanced Vector Extensions */ #define X86_FEATURE_AVX2 (9*32+ 5) /* AVX2 instructions */ #define X86_FEATURE_MMXEXT (1*32+22) /* AMD MMX extensions */ /* Should work well enough on modern CPUs for testing */
static inline int boot_cpu_has(int flag) { u32 eax, ebx, ecx, edx; eax = (flag & 0x100) ? 7 : (flag & 0x20) ? 0x80000001 : 1; ecx = 0; asm volatile("cpuid" : "+a" (eax), "=b" (ebx), "=d" (edx), "+c" (ecx)); return ((flag & 0x100 ? ebx : (flag & 0x80) ? ecx : edx) >> (flag & 31)) & 1; }

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jim kukunasjim kukunas4154.67%240.00%
h. peter anvinh. peter anvin1925.33%120.00%
andrew mortonandrew morton1520.00%240.00%
Total75100.00%5100.00%

#endif /* ndef __KERNEL__ */ #endif #endif

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jim kukunasjim kukunas6836.17%222.22%
andrew mortonandrew morton5830.85%222.22%
h. peter anvinh. peter anvin5127.13%111.11%
al viroal viro84.26%111.11%
atsushi sakaiatsushi sakai10.53%111.11%
ingo molnaringo molnar10.53%111.11%
neil brownneil brown10.53%111.11%
Total188100.00%9100.00%
Directory: lib/raid6
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