Cregit: Linux 5.8: atomic.h

Contributors: 10
Author	Tokens	Token Proportion	Commits	Commit Proportion
Linus Torvalds (pre-git)	30	28.57%	1	7.69%
Paul Mundt	25	23.81%	3	23.08%
Rich Felker	14	13.33%	1	7.69%
Stuart Menefy	14	13.33%	1	7.69%
Matthew Wilcox	8	7.62%	1	7.69%
Nicholas Piggin	6	5.71%	1	7.69%
Peter Zijlstra	5	4.76%	2	15.38%
Nobuhiro Iwamatsu	1	0.95%	1	7.69%
David Howells	1	0.95%	1	7.69%
Greg Kroah-Hartman	1	0.95%	1	7.69%
Total	105		13

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

#if defined(CONFIG_CPU_J2)

#include <asm-generic/atomic.h>

#else

/*
 * Atomic operations that C can't guarantee us.  Useful for
 * resource counting etc..
 *
 */

#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/cmpxchg.h>
#include <asm/barrier.h>

#define ATOMIC_INIT(i)	{ (i) }

#define atomic_read(v)		READ_ONCE((v)->counter)
#define atomic_set(v,i)		WRITE_ONCE((v)->counter, (i))

#if defined(CONFIG_GUSA_RB)
#include <asm/atomic-grb.h>
#elif defined(CONFIG_CPU_SH4A)
#include <asm/atomic-llsc.h>
#else
#include <asm/atomic-irq.h>
#endif

#define atomic_xchg(v, new)		(xchg(&((v)->counter), new))
#define atomic_cmpxchg(v, o, n)		(cmpxchg(&((v)->counter), (o), (n)))

#endif /* CONFIG_CPU_J2 */

#endif /* __ASM_SH_ATOMIC_H */