cregit-Linux how code gets into the kernel

Release 4.14 arch/sh/include/asm/futex.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_FUTEX_H

#define __ASM_SH_FUTEX_H

#ifdef __KERNEL__

#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/errno.h>

#if !defined(CONFIG_SMP)
#include <asm/futex-irq.h>
#elif defined(CONFIG_CPU_J2)
#include <asm/futex-cas.h>
#elif defined(CONFIG_CPU_SH4A)
#include <asm/futex-llsc.h>
#else
#error SMP not supported on this configuration.
#endif


static inline int futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 oldval, u32 newval) { if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) return -EFAULT; return atomic_futex_op_cmpxchg_inatomic(uval, uaddr, oldval, newval); }

Contributors

PersonTokensPropCommitsCommitProp
Rich Felker53100.00%1100.00%
Total53100.00%1100.00%


static inline int arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval, u32 __user *uaddr) { u32 oldval, newval, prev; int ret; pagefault_disable(); do { if (op == FUTEX_OP_SET) ret = oldval = 0; else ret = get_user(oldval, uaddr); if (ret) break; switch (op) { case FUTEX_OP_SET: newval = oparg; break; case FUTEX_OP_ADD: newval = oldval + oparg; break; case FUTEX_OP_OR: newval = oldval | oparg; break; case FUTEX_OP_ANDN: newval = oldval & ~oparg; break; case FUTEX_OP_XOR: newval = oldval ^ oparg; break; default: ret = -ENOSYS; break; } if (ret) break; ret = futex_atomic_cmpxchg_inatomic(&prev, uaddr, oldval, newval); } while (!ret && prev != oldval); pagefault_enable(); if (!ret) *oval = oldval; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Kaz Kojima8247.67%125.00%
Rich Felker7845.35%125.00%
Jiri Slaby116.40%125.00%
Michel Lespinasse10.58%125.00%
Total172100.00%4100.00%

#endif /* __KERNEL__ */ #endif /* __ASM_SH_FUTEX_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Rich Felker16357.19%114.29%
Kaz Kojima9934.74%114.29%
Jiri Slaby113.86%114.29%
Jakub Jelínek82.81%114.29%
Jeff Dike20.70%114.29%
Michel Lespinasse10.35%114.29%
Greg Kroah-Hartman10.35%114.29%
Total285100.00%7100.00%
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