1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_SH_FUTEX_CAS_H
3#define __ASM_SH_FUTEX_CAS_H
4
5static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
6						   u32 __user *uaddr,
7						   u32 oldval, u32 newval)
8{
9	int err = 0;
10	__asm__ __volatile__(
11		"1:\n\t"
12		"cas.l	%2, %1, @r0\n"
13		"2:\n\t"
14#ifdef CONFIG_MMU
15		".section	.fixup,\"ax\"\n"
16		"3:\n\t"
17		"mov.l	4f, %0\n\t"
18		"jmp	@%0\n\t"
19		" mov	%3, %0\n\t"
20		".balign	4\n"
21		"4:	.long	2b\n\t"
22		".previous\n"
23		".section	__ex_table,\"a\"\n\t"
24		".long	1b, 3b\n\t"
25		".previous"
26#endif
27		:"+r" (err), "+r" (newval)
28		:"r" (oldval), "i" (-EFAULT), "z" (uaddr)
29		:"t", "memory");
30	if (err) return err;
31	*uval = newval;
32	return 0;
33}
34
35#endif /* __ASM_SH_FUTEX_CAS_H */
36