futex-irq.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_FUTEX_IRQ_H
 3#define __ASM_SH_FUTEX_IRQ_H
 4
 5static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
 6						   u32 __user *uaddr,
 7						   u32 oldval, u32 newval)
 8{
 9	unsigned long flags;
10	int ret;
11	u32 prev = 0;
12
13	local_irq_save(flags);
14
15	ret = get_user(prev, uaddr);
16	if (!ret && oldval == prev)
17		ret = put_user(newval, uaddr);
18
19	local_irq_restore(flags);
20
21	*uval = prev;
22	return ret;
23}
24
25#endif /* __ASM_SH_FUTEX_IRQ_H */