Cregit: Linux 6.12: cmpxchg-cas.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Rich Felker	61	72.62%	1	16.67%
Tom Rini	16	19.05%	1	16.67%
David Howells	2	2.38%	1	16.67%
Linus Torvalds (pre-git)	2	2.38%	1	16.67%
Akinobu Mita	2	2.38%	1	16.67%
Greg Kroah-Hartman	1	1.19%	1	16.67%
Total	84		6

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_CMPXCHG_CAS_H
#define __ASM_SH_CMPXCHG_CAS_H

static inline unsigned long
__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
{
	__asm__ __volatile__("cas.l %1,%0,@r0"
		: "+r"(new)
		: "r"(old), "z"(m)
		: "t", "memory" );
	return new;
}

static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
{
	unsigned long old;
	do old = *m;
	while (__cmpxchg_u32(m, old, val) != old);
	return old;
}

#include <asm/cmpxchg-xchg.h>

#endif /* __ASM_SH_CMPXCHG_CAS_H */