Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/sh/include/asm/futex.h
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/* 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(uaddr, sizeof(u32))) return -EFAULT; return atomic_futex_op_cmpxchg_inatomic(uval, uaddr, oldval, newval); } 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 { 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; } #endif /* __KERNEL__ */ #endif /* __ASM_SH_FUTEX_H */
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