Cregit: Linux 5.13: cmpxchg

Contributors: 9
Author	Tokens	Token Proportion	Commits	Commit Proportion
Jeremy Fitzhardinge	30	50.85%	2	20.00%
Mathieu Desnoyers	10	16.95%	1	10.00%
Jeff Dike	6	10.17%	1	10.00%
Christoph Lameter	4	6.78%	1	10.00%
H. Peter Anvin	3	5.08%	1	10.00%
Mark Rutland	2	3.39%	1	10.00%
Dmitriy Vyukov	2	3.39%	1	10.00%
Greg Kroah-Hartman	1	1.69%	1	10.00%
Borislav Petkov	1	1.69%	1	10.00%
Total	59		10

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_CMPXCHG_64_H
#define _ASM_X86_CMPXCHG_64_H

static inline void set_64bit(volatile u64 *ptr, u64 val)
{
	*ptr = val;
}

#define arch_cmpxchg64(ptr, o, n)					\
({									\
	BUILD_BUG_ON(sizeof(*(ptr)) != 8);				\
	arch_cmpxchg((ptr), (o), (n));					\
})

#define arch_cmpxchg64_local(ptr, o, n)					\
({									\
	BUILD_BUG_ON(sizeof(*(ptr)) != 8);				\
	arch_cmpxchg_local((ptr), (o), (n));				\
})

#define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX16)

#endif /* _ASM_X86_CMPXCHG_64_H */

cmpxchg_64.h