/* SPDX-License-Identifier: GPL-2.0-or-later *//* * Generic implementation of 64-bit atomics using spinlocks, * useful on processors that don't have 64-bit atomic instructions. * * Copyright © 2009 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> */#ifndef _ASM_GENERIC_ATOMIC64_H#define _ASM_GENERIC_ATOMIC64_H#include <linux/types.h> typedef struct {	s64 __aligned(sizeof(s64)) counter;} atomic64_t; #define ATOMIC64_INIT(i)	{ (i) } extern s64 generic_atomic64_read(const atomic64_t *v);extern void generic_atomic64_set(atomic64_t *v, s64 i); #define ATOMIC64_OP(op)							\extern void generic_atomic64_##op(s64 a, atomic64_t *v); #define ATOMIC64_OP_RETURN(op)						\extern s64 generic_atomic64_##op##_return(s64 a, atomic64_t *v); #define ATOMIC64_FETCH_OP(op)						\extern s64 generic_atomic64_fetch_##op(s64 a, atomic64_t *v); #define ATOMIC64_OPS(op)	ATOMIC64_OP(op) ATOMIC64_OP_RETURN(op) ATOMIC64_FETCH_OP(op) ATOMIC64_OPS(add)ATOMIC64_OPS(sub) #undef ATOMIC64_OPS#define ATOMIC64_OPS(op)	ATOMIC64_OP(op) ATOMIC64_FETCH_OP(op) ATOMIC64_OPS(and)ATOMIC64_OPS(or)ATOMIC64_OPS(xor) #undef ATOMIC64_OPS#undef ATOMIC64_FETCH_OP#undef ATOMIC64_OP_RETURN#undef ATOMIC64_OP extern s64 generic_atomic64_dec_if_positive(atomic64_t *v);extern s64 generic_atomic64_cmpxchg(atomic64_t *v, s64 o, s64 n);extern s64 generic_atomic64_xchg(atomic64_t *v, s64 new);extern s64 generic_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u); #define arch_atomic64_read		generic_atomic64_read#define arch_atomic64_set		generic_atomic64_set#define arch_atomic64_set_release	generic_atomic64_set #define arch_atomic64_add		generic_atomic64_add#define arch_atomic64_add_return	generic_atomic64_add_return#define arch_atomic64_fetch_add		generic_atomic64_fetch_add#define arch_atomic64_sub		generic_atomic64_sub#define arch_atomic64_sub_return	generic_atomic64_sub_return#define arch_atomic64_fetch_sub		generic_atomic64_fetch_sub #define arch_atomic64_and		generic_atomic64_and#define arch_atomic64_fetch_and		generic_atomic64_fetch_and#define arch_atomic64_or		generic_atomic64_or#define arch_atomic64_fetch_or		generic_atomic64_fetch_or#define arch_atomic64_xor		generic_atomic64_xor#define arch_atomic64_fetch_xor		generic_atomic64_fetch_xor #define arch_atomic64_dec_if_positive	generic_atomic64_dec_if_positive#define arch_atomic64_cmpxchg		generic_atomic64_cmpxchg#define arch_atomic64_xchg		generic_atomic64_xchg#define arch_atomic64_fetch_add_unless	generic_atomic64_fetch_add_unless #endif  /*  _ASM_GENERIC_ATOMIC64_H  */