cregit-Linux how code gets into the kernel

Release 4.8 arch/sh/include/asm/bitops.h

#ifndef __ASM_SH_BITOPS_H

#define __ASM_SH_BITOPS_H

#ifdef __KERNEL__

#ifndef _LINUX_BITOPS_H
#error only <linux/bitops.h> can be included directly
#endif

/* For __swab32 */
#include <asm/byteorder.h>
#include <asm/barrier.h>

#ifdef CONFIG_GUSA_RB
#include <asm/bitops-grb.h>
#elif defined(CONFIG_CPU_SH2A)
#include <asm-generic/bitops/atomic.h>
#include <asm/bitops-op32.h>
#elif defined(CONFIG_CPU_SH4A)
#include <asm/bitops-llsc.h>
#elif defined(CONFIG_CPU_J2) && defined(CONFIG_SMP)
#include <asm/bitops-cas.h>
#else
#include <asm-generic/bitops/atomic.h>
#include <asm-generic/bitops/non-atomic.h>
#endif

#ifdef CONFIG_SUPERH32

static inline unsigned long ffz(unsigned long word) { unsigned long result; __asm__("1:\n\t" "shlr %1\n\t" "bt/s 1b\n\t" " add #1, %0" : "=r" (result), "=r" (word) : "0" (~0L), "1" (word) : "t"); return result; }

Contributors

PersonTokensPropCommitsCommitProp
akinobu mitaakinobu mita1050.00%133.33%
linus torvaldslinus torvalds945.00%133.33%
paul mundtpaul mundt15.00%133.33%
Total20100.00%3100.00%

/** * __ffs - find first bit in word. * @word: The word to search * * Undefined if no bit exists, so code should check against 0 first. */
static inline unsigned long __ffs(unsigned long word) { unsigned long result; __asm__("1:\n\t" "shlr %1\n\t" "bf/s 1b\n\t" " add #1, %0" : "=r" (result), "=r" (word) : "0" (~0L), "1" (word) : "t"); return result; }

Contributors

PersonTokensPropCommitsCommitProp
paul mundtpaul mundt1680.00%250.00%
akinobu mitaakinobu mita315.00%125.00%
pre-gitpre-git15.00%125.00%
Total20100.00%4100.00%

#else
static inline unsigned long ffz(unsigned long word) { unsigned long result, __d2, __d3; __asm__("gettr tr0, %2\n\t" "pta $+32, tr0\n\t" "andi %1, 1, %3\n\t" "beq %3, r63, tr0\n\t" "pta $+4, tr0\n" "0:\n\t" "shlri.l %1, 1, %1\n\t" "addi %0, 1, %0\n\t" "andi %1, 1, %3\n\t" "beqi %3, 1, tr0\n" "1:\n\t" "ptabs %2, tr0\n\t" : "=r" (result), "=r" (word), "=r" (__d2), "=r" (__d3) : "0" (0L), "1" (word)); return result; }

Contributors

PersonTokensPropCommitsCommitProp
paul mundtpaul mundt24100.00%1100.00%
Total24100.00%1100.00%

#include <asm-generic/bitops/__ffs.h> #endif #include <asm-generic/bitops/find.h> #include <asm-generic/bitops/ffs.h> #include <asm-generic/bitops/hweight.h> #include <asm-generic/bitops/lock.h> #include <asm-generic/bitops/sched.h> #include <asm-generic/bitops/le.h> #include <asm-generic/bitops/ext2-atomic.h> #include <asm-generic/bitops/fls.h> #include <asm-generic/bitops/__fls.h> #include <asm-generic/bitops/fls64.h> #endif /* __KERNEL__ */ #endif /* __ASM_SH_BITOPS_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
paul mundtpaul mundt7640.86%635.29%
akinobu mitaakinobu mita3820.43%211.76%
pre-gitpre-git2010.75%211.76%
rich felkerrich felker147.53%15.88%
stuart menefystuart menefy126.45%15.88%
linus torvaldslinus torvalds94.84%15.88%
jiri slabyjiri slaby84.30%15.88%
nick pigginnick piggin31.61%15.88%
peter zijlstrapeter zijlstra31.61%15.88%
alexander van heukelumalexander van heukelum31.61%15.88%
Total186100.00%17100.00%
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