cregit-Linux how code gets into the kernel

Release 4.14 arch/x86/um/delay.c

Directory: arch/x86/um
/*
 * Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
 * Mostly copied from arch/x86/lib/delay.c
 *
 * 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/export.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <asm/param.h>


void __delay(unsigned long loops) { asm volatile( "test %0,%0\n" "jz 3f\n" "jmp 1f\n" ".align 16\n" "1: jmp 2f\n" ".align 16\n" "2: dec %0\n" " jnz 2b\n" "3: dec %0\n" : /* we don't need output */ : "a" (loops) ); }

Contributors

PersonTokensPropCommitsCommitProp
Jeff Dike857.14%150.00%
Richard Weinberger642.86%150.00%
Total14100.00%2100.00%

EXPORT_SYMBOL(__delay);
inline void __const_udelay(unsigned long xloops) { int d0; xloops *= 4; asm("mull %%edx" : "=d" (xloops), "=&a" (d0) : "1" (xloops), "0" (loops_per_jiffy * (HZ/4))); __delay(++xloops); }

Contributors

PersonTokensPropCommitsCommitProp
Richard Weinberger1875.00%133.33%
Jeff Dike625.00%266.67%
Total24100.00%3100.00%

EXPORT_SYMBOL(__const_udelay);
void __udelay(unsigned long usecs) { __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */ }

Contributors

PersonTokensPropCommitsCommitProp
Bodo Stroesser1058.82%133.33%
Richard Weinberger635.29%133.33%
Jeff Dike15.88%133.33%
Total17100.00%3100.00%

EXPORT_SYMBOL(__udelay);
void __ndelay(unsigned long nsecs) { __const_udelay(nsecs * 0x00005); /* 2**32 / 1000000000 (rounded up) */ }

Contributors

PersonTokensPropCommitsCommitProp
Richard Weinberger17100.00%1100.00%
Total17100.00%1100.00%

EXPORT_SYMBOL(__ndelay);

Overall Contributors

PersonTokensPropCommitsCommitProp
Richard Weinberger6561.90%120.00%
Jeff Dike2523.81%240.00%
Bodo Stroesser1413.33%120.00%
Paul Gortmaker10.95%120.00%
Total105100.00%5100.00%
Directory: arch/x86/um
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