diff options
Diffstat (limited to 'arch/sh/include/asm/futex-irq.h')
| -rw-r--r-- | arch/sh/include/asm/futex-irq.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/sh/include/asm/futex-irq.h b/arch/sh/include/asm/futex-irq.h new file mode 100644 index 0000000000..9bc053242e --- /dev/null +++ b/arch/sh/include/asm/futex-irq.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_FUTEX_IRQ_H +#define __ASM_SH_FUTEX_IRQ_H + +static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, + u32 __user *uaddr, + u32 oldval, u32 newval) +{ + unsigned long flags; + int ret; + u32 prev = 0; + + local_irq_save(flags); + + ret = get_user(prev, uaddr); + if (!ret && oldval == prev) + ret = put_user(newval, uaddr); + + local_irq_restore(flags); + + *uval = prev; + return ret; +} + +#endif /* __ASM_SH_FUTEX_IRQ_H */ |