/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_ATOMIC64_32_H #define _ASM_X86_ATOMIC64_32_H #include <linux/compiler.h> #include <linux/types.h> //#include <asm/cmpxchg.h> /* An 64bit atomic type */ atomic64_t; #define ATOMIC64_INIT(val) … /* * Read an atomic64_t non-atomically. * * This is intended to be used in cases where a subsequent atomic operation * will handle the torn value, and can be used to prime the first iteration * of unconditional try_cmpxchg() loops, e.g.: * * s64 val = arch_atomic64_read_nonatomic(v); * do { } while (!arch_atomic64_try_cmpxchg(v, &val, val OP i); * * This is NOT safe to use where the value is not always checked by a * subsequent atomic operation, such as in conditional try_cmpxchg() loops * that can break before the atomic operation, e.g.: * * s64 val = arch_atomic64_read_nonatomic(v); * do { * if (condition(val)) * break; * } while (!arch_atomic64_try_cmpxchg(v, &val, val OP i); */ static __always_inline s64 arch_atomic64_read_nonatomic(const atomic64_t *v) { … } #define __ATOMIC64_DECL … #ifndef ATOMIC64_EXPORT #define ATOMIC64_DECL_ONE … #else #define ATOMIC64_DECL_ONE … #endif #ifdef CONFIG_X86_CMPXCHG64 #define __alternative_atomic64 … #define ATOMIC64_DECL … #else #define __alternative_atomic64 … #define ATOMIC64_DECL … ATOMIC64_DECL_ONE(add_386); ATOMIC64_DECL_ONE(sub_386); ATOMIC64_DECL_ONE(inc_386); ATOMIC64_DECL_ONE(dec_386); #endif #define alternative_atomic64 … ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; ATOMIC64_DECL; #undef ATOMIC64_DECL #undef ATOMIC64_DECL_ONE #undef __ATOMIC64_DECL #undef ATOMIC64_EXPORT static __always_inline s64 arch_atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new) { … } #define arch_atomic64_cmpxchg … static __always_inline bool arch_atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new) { … } #define arch_atomic64_try_cmpxchg … static __always_inline s64 arch_atomic64_xchg(atomic64_t *v, s64 n) { … } #define arch_atomic64_xchg … static __always_inline void arch_atomic64_set(atomic64_t *v, s64 i) { … } static __always_inline s64 arch_atomic64_read(const atomic64_t *v) { … } static __always_inline s64 arch_atomic64_add_return(s64 i, atomic64_t *v) { … } #define arch_atomic64_add_return … static __always_inline s64 arch_atomic64_sub_return(s64 i, atomic64_t *v) { … } #define arch_atomic64_sub_return … static __always_inline s64 arch_atomic64_inc_return(atomic64_t *v) { … } #define arch_atomic64_inc_return … static __always_inline s64 arch_atomic64_dec_return(atomic64_t *v) { … } #define arch_atomic64_dec_return … static __always_inline void arch_atomic64_add(s64 i, atomic64_t *v) { … } static __always_inline void arch_atomic64_sub(s64 i, atomic64_t *v) { … } static __always_inline void arch_atomic64_inc(atomic64_t *v) { … } #define arch_atomic64_inc … static __always_inline void arch_atomic64_dec(atomic64_t *v) { … } #define arch_atomic64_dec … static __always_inline int arch_atomic64_add_unless(atomic64_t *v, s64 a, s64 u) { … } #define arch_atomic64_add_unless … static __always_inline int arch_atomic64_inc_not_zero(atomic64_t *v) { … } #define arch_atomic64_inc_not_zero … static __always_inline s64 arch_atomic64_dec_if_positive(atomic64_t *v) { … } #define arch_atomic64_dec_if_positive … #undef alternative_atomic64 #undef __alternative_atomic64 static __always_inline void arch_atomic64_and(s64 i, atomic64_t *v) { … } static __always_inline s64 arch_atomic64_fetch_and(s64 i, atomic64_t *v) { … } #define arch_atomic64_fetch_and … static __always_inline void arch_atomic64_or(s64 i, atomic64_t *v) { … } static __always_inline s64 arch_atomic64_fetch_or(s64 i, atomic64_t *v) { … } #define arch_atomic64_fetch_or … static __always_inline void arch_atomic64_xor(s64 i, atomic64_t *v) { … } static __always_inline s64 arch_atomic64_fetch_xor(s64 i, atomic64_t *v) { … } #define arch_atomic64_fetch_xor … static __always_inline s64 arch_atomic64_fetch_add(s64 i, atomic64_t *v) { … } #define arch_atomic64_fetch_add … #define arch_atomic64_fetch_sub(i, v) … #endif /* _ASM_X86_ATOMIC64_32_H */
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