cregit-Linux how code gets into the kernel

Release 4.12 include/asm-generic/xor.h

/*
 * include/asm-generic/xor.h
 *
 * Generic optimized RAID-5 checksumming functions.
 *
 * 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; either version 2, or (at your option)
 * any later version.
 *
 * You should have received a copy of the GNU General Public License
 * (for example /usr/src/linux/COPYING); if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/prefetch.h>


static void xor_8regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) { long lines = bytes / (sizeof (long)) / 8; do { p1[0] ^= p2[0]; p1[1] ^= p2[1]; p1[2] ^= p2[2]; p1[3] ^= p2[3]; p1[4] ^= p2[4]; p1[5] ^= p2[5]; p1[6] ^= p2[6]; p1[7] ^= p2[7]; p1 += 8; p2 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)133100.00%1100.00%
Total133100.00%1100.00%


static void xor_8regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3) { long lines = bytes / (sizeof (long)) / 8; do { p1[0] ^= p2[0] ^ p3[0]; p1[1] ^= p2[1] ^ p3[1]; p1[2] ^= p2[2] ^ p3[2]; p1[3] ^= p2[3] ^ p3[3]; p1[4] ^= p2[4] ^ p3[4]; p1[5] ^= p2[5] ^ p3[5]; p1[6] ^= p2[6] ^ p3[6]; p1[7] ^= p2[7] ^ p3[7]; p1 += 8; p2 += 8; p3 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)182100.00%1100.00%
Total182100.00%1100.00%


static void xor_8regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4) { long lines = bytes / (sizeof (long)) / 8; do { p1[0] ^= p2[0] ^ p3[0] ^ p4[0]; p1[1] ^= p2[1] ^ p3[1] ^ p4[1]; p1[2] ^= p2[2] ^ p3[2] ^ p4[2]; p1[3] ^= p2[3] ^ p3[3] ^ p4[3]; p1[4] ^= p2[4] ^ p3[4] ^ p4[4]; p1[5] ^= p2[5] ^ p3[5] ^ p4[5]; p1[6] ^= p2[6] ^ p3[6] ^ p4[6]; p1[7] ^= p2[7] ^ p3[7] ^ p4[7]; p1 += 8; p2 += 8; p3 += 8; p4 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)231100.00%1100.00%
Total231100.00%1100.00%


static void xor_8regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4, unsigned long *p5) { long lines = bytes / (sizeof (long)) / 8; do { p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0]; p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1]; p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2]; p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3]; p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4]; p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5]; p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6]; p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7]; p1 += 8; p2 += 8; p3 += 8; p4 += 8; p5 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)280100.00%1100.00%
Total280100.00%1100.00%


static void xor_32regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) { long lines = bytes / (sizeof (long)) / 8; do { register long d0, d1, d2, d3, d4, d5, d6, d7; d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)24199.59%150.00%
Matthew Wilcox10.41%150.00%
Total242100.00%2100.00%


static void xor_32regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3) { long lines = bytes / (sizeof (long)) / 8; do { register long d0, d1, d2, d3, d4, d5, d6, d7; d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; d0 ^= p3[0]; d1 ^= p3[1]; d2 ^= p3[2]; d3 ^= p3[3]; d4 ^= p3[4]; d5 ^= p3[5]; d6 ^= p3[6]; d7 ^= p3[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; p3 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)30699.67%150.00%
Matthew Wilcox10.33%150.00%
Total307100.00%2100.00%


static void xor_32regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4) { long lines = bytes / (sizeof (long)) / 8; do { register long d0, d1, d2, d3, d4, d5, d6, d7; d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; d0 ^= p3[0]; d1 ^= p3[1]; d2 ^= p3[2]; d3 ^= p3[3]; d4 ^= p3[4]; d5 ^= p3[5]; d6 ^= p3[6]; d7 ^= p3[7]; d0 ^= p4[0]; d1 ^= p4[1]; d2 ^= p4[2]; d3 ^= p4[3]; d4 ^= p4[4]; d5 ^= p4[5]; d6 ^= p4[6]; d7 ^= p4[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; p3 += 8; p4 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)37199.73%150.00%
Matthew Wilcox10.27%150.00%
Total372100.00%2100.00%


static void xor_32regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4, unsigned long *p5) { long lines = bytes / (sizeof (long)) / 8; do { register long d0, d1, d2, d3, d4, d5, d6, d7; d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; d0 ^= p3[0]; d1 ^= p3[1]; d2 ^= p3[2]; d3 ^= p3[3]; d4 ^= p3[4]; d5 ^= p3[5]; d6 ^= p3[6]; d7 ^= p3[7]; d0 ^= p4[0]; d1 ^= p4[1]; d2 ^= p4[2]; d3 ^= p4[3]; d4 ^= p4[4]; d5 ^= p4[5]; d6 ^= p4[6]; d7 ^= p4[7]; d0 ^= p5[0]; d1 ^= p5[1]; d2 ^= p5[2]; d3 ^= p5[3]; d4 ^= p5[4]; d5 ^= p5[5]; d6 ^= p5[6]; d7 ^= p5[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; p3 += 8; p4 += 8; p5 += 8; } while (--lines > 0); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)43699.77%150.00%
Matthew Wilcox10.23%150.00%
Total437100.00%2100.00%


static void xor_8regs_p_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); do { prefetchw(p1+8); prefetch(p2+8); once_more: p1[0] ^= p2[0]; p1[1] ^= p2[1]; p1[2] ^= p2[2]; p1[3] ^= p2[3]; p1[4] ^= p2[4]; p1[5] ^= p2[5]; p1[6] ^= p2[6]; p1[7] ^= p2[7]; p1 += 8; p2 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox16798.24%150.00%
Linus Torvalds (pre-git)31.76%150.00%
Total170100.00%2100.00%


static void xor_8regs_p_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); prefetch(p3); do { prefetchw(p1+8); prefetch(p2+8); prefetch(p3+8); once_more: p1[0] ^= p2[0] ^ p3[0]; p1[1] ^= p2[1] ^ p3[1]; p1[2] ^= p2[2] ^ p3[2]; p1[3] ^= p2[3] ^ p3[3]; p1[4] ^= p2[4] ^ p3[4]; p1[5] ^= p2[5] ^ p3[5]; p1[6] ^= p2[6] ^ p3[6]; p1[7] ^= p2[7] ^ p3[7]; p1 += 8; p2 += 8; p3 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox22898.70%150.00%
Linus Torvalds (pre-git)31.30%150.00%
Total231100.00%2100.00%


static void xor_8regs_p_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); prefetch(p3); prefetch(p4); do { prefetchw(p1+8); prefetch(p2+8); prefetch(p3+8); prefetch(p4+8); once_more: p1[0] ^= p2[0] ^ p3[0] ^ p4[0]; p1[1] ^= p2[1] ^ p3[1] ^ p4[1]; p1[2] ^= p2[2] ^ p3[2] ^ p4[2]; p1[3] ^= p2[3] ^ p3[3] ^ p4[3]; p1[4] ^= p2[4] ^ p3[4] ^ p4[4]; p1[5] ^= p2[5] ^ p3[5] ^ p4[5]; p1[6] ^= p2[6] ^ p3[6] ^ p4[6]; p1[7] ^= p2[7] ^ p3[7] ^ p4[7]; p1 += 8; p2 += 8; p3 += 8; p4 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox292100.00%1100.00%
Total292100.00%1100.00%


static void xor_8regs_p_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4, unsigned long *p5) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); prefetch(p3); prefetch(p4); prefetch(p5); do { prefetchw(p1+8); prefetch(p2+8); prefetch(p3+8); prefetch(p4+8); prefetch(p5+8); once_more: p1[0] ^= p2[0] ^ p3[0] ^ p4[0] ^ p5[0]; p1[1] ^= p2[1] ^ p3[1] ^ p4[1] ^ p5[1]; p1[2] ^= p2[2] ^ p3[2] ^ p4[2] ^ p5[2]; p1[3] ^= p2[3] ^ p3[3] ^ p4[3] ^ p5[3]; p1[4] ^= p2[4] ^ p3[4] ^ p4[4] ^ p5[4]; p1[5] ^= p2[5] ^ p3[5] ^ p4[5] ^ p5[5]; p1[6] ^= p2[6] ^ p3[6] ^ p4[6] ^ p5[6]; p1[7] ^= p2[7] ^ p3[7] ^ p4[7] ^ p5[7]; p1 += 8; p2 += 8; p3 += 8; p4 += 8; p5 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox353100.00%1100.00%
Total353100.00%1100.00%


static void xor_32regs_p_2(unsigned long bytes, unsigned long *p1, unsigned long *p2) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); do { register long d0, d1, d2, d3, d4, d5, d6, d7; prefetchw(p1+8); prefetch(p2+8); once_more: d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox279100.00%1100.00%
Total279100.00%1100.00%


static void xor_32regs_p_3(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); prefetch(p3); do { register long d0, d1, d2, d3, d4, d5, d6, d7; prefetchw(p1+8); prefetch(p2+8); prefetch(p3+8); once_more: d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; d0 ^= p3[0]; d1 ^= p3[1]; d2 ^= p3[2]; d3 ^= p3[3]; d4 ^= p3[4]; d5 ^= p3[5]; d6 ^= p3[6]; d7 ^= p3[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; p3 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox356100.00%1100.00%
Total356100.00%1100.00%


static void xor_32regs_p_4(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); prefetch(p3); prefetch(p4); do { register long d0, d1, d2, d3, d4, d5, d6, d7; prefetchw(p1+8); prefetch(p2+8); prefetch(p3+8); prefetch(p4+8); once_more: d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; d0 ^= p3[0]; d1 ^= p3[1]; d2 ^= p3[2]; d3 ^= p3[3]; d4 ^= p3[4]; d5 ^= p3[5]; d6 ^= p3[6]; d7 ^= p3[7]; d0 ^= p4[0]; d1 ^= p4[1]; d2 ^= p4[2]; d3 ^= p4[3]; d4 ^= p4[4]; d5 ^= p4[5]; d6 ^= p4[6]; d7 ^= p4[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; p3 += 8; p4 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox433100.00%1100.00%
Total433100.00%1100.00%


static void xor_32regs_p_5(unsigned long bytes, unsigned long *p1, unsigned long *p2, unsigned long *p3, unsigned long *p4, unsigned long *p5) { long lines = bytes / (sizeof (long)) / 8 - 1; prefetchw(p1); prefetch(p2); prefetch(p3); prefetch(p4); prefetch(p5); do { register long d0, d1, d2, d3, d4, d5, d6, d7; prefetchw(p1+8); prefetch(p2+8); prefetch(p3+8); prefetch(p4+8); prefetch(p5+8); once_more: d0 = p1[0]; /* Pull the stuff into registers */ d1 = p1[1]; /* ... in bursts, if possible. */ d2 = p1[2]; d3 = p1[3]; d4 = p1[4]; d5 = p1[5]; d6 = p1[6]; d7 = p1[7]; d0 ^= p2[0]; d1 ^= p2[1]; d2 ^= p2[2]; d3 ^= p2[3]; d4 ^= p2[4]; d5 ^= p2[5]; d6 ^= p2[6]; d7 ^= p2[7]; d0 ^= p3[0]; d1 ^= p3[1]; d2 ^= p3[2]; d3 ^= p3[3]; d4 ^= p3[4]; d5 ^= p3[5]; d6 ^= p3[6]; d7 ^= p3[7]; d0 ^= p4[0]; d1 ^= p4[1]; d2 ^= p4[2]; d3 ^= p4[3]; d4 ^= p4[4]; d5 ^= p4[5]; d6 ^= p4[6]; d7 ^= p4[7]; d0 ^= p5[0]; d1 ^= p5[1]; d2 ^= p5[2]; d3 ^= p5[3]; d4 ^= p5[4]; d5 ^= p5[5]; d6 ^= p5[6]; d7 ^= p5[7]; p1[0] = d0; /* Store the result (in bursts) */ p1[1] = d1; p1[2] = d2; p1[3] = d3; p1[4] = d4; p1[5] = d5; p1[6] = d6; p1[7] = d7; p1 += 8; p2 += 8; p3 += 8; p4 += 8; p5 += 8; } while (--lines > 0); if (lines == 0) goto once_more; }

Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox510100.00%1100.00%
Total510100.00%1100.00%

static struct xor_block_template xor_block_8regs = { .name = "8regs", .do_2 = xor_8regs_2, .do_3 = xor_8regs_3, .do_4 = xor_8regs_4, .do_5 = xor_8regs_5, }; static struct xor_block_template xor_block_32regs = { .name = "32regs", .do_2 = xor_32regs_2, .do_3 = xor_32regs_3, .do_4 = xor_32regs_4, .do_5 = xor_32regs_5, }; static struct xor_block_template xor_block_8regs_p __maybe_unused = { .name = "8regs_prefetch", .do_2 = xor_8regs_p_2, .do_3 = xor_8regs_p_3, .do_4 = xor_8regs_p_4, .do_5 = xor_8regs_p_5, }; static struct xor_block_template xor_block_32regs_p __maybe_unused = { .name = "32regs_prefetch", .do_2 = xor_32regs_p_2, .do_3 = xor_32regs_p_3, .do_4 = xor_32regs_p_4, .do_5 = xor_32regs_p_5, }; #define XOR_TRY_TEMPLATES \ do { \ xor_speed(&xor_block_8regs); \ xor_speed(&xor_block_8regs_p); \ xor_speed(&xor_block_32regs); \ xor_speed(&xor_block_32regs_p); \ } while (0)

Overall Contributors

PersonTokensPropCommitsCommitProp
Matthew Wilcox271154.80%120.00%
Linus Torvalds (pre-git)219344.33%120.00%
Neil Brown400.81%120.00%
Arnd Bergmann20.04%120.00%
Linus Torvalds10.02%120.00%
Total4947100.00%5100.00%
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