Release 4.14 arch/score/include/asm/cmpxchg.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_SCORE_CMPXCHG_H

#define _ASM_SCORE_CMPXCHG_H

#include <linux/irqflags.h>



struct __xchg_dummy { unsigned long a[100]; };

#define __xg(x) ((struct __xchg_dummy *)(x))


static inline

unsigned long __xchg(volatile unsigned long *m, unsigned long val)
{
	unsigned long retval;
	unsigned long flags;

	local_irq_save(flags);
	retval = *m;
	*m = val;
	local_irq_restore(flags);
	return retval;
}

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#define xchg(ptr, v)						\
	((__typeof__(*(ptr))) __xchg((unsigned long *)(ptr),    \
                                        (unsigned long)(v)))



static inline unsigned long __cmpxchg(volatile unsigned long *m,
				unsigned long old, unsigned long new)
{
	unsigned long retval;
	unsigned long flags;

	local_irq_save(flags);
	retval = *m;
	if (retval == old)
		*m = new;
	local_irq_restore(flags);
	return retval;
}

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#define cmpxchg(ptr, o, n)					\
	((__typeof__(*(ptr))) __cmpxchg((unsigned long *)(ptr), \
                                        (unsigned long)(o),     \
                                        (unsigned long)(n)))

#include <asm-generic/cmpxchg-local.h>

#endif /* _ASM_SCORE_CMPXCHG_H */
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Directory: arch/score/include/asm

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