mirror of
https://github.com/lkl/linux.git
synced 2025-12-19 08:03:01 +09:00
8a298ba102
Linux 5.14 Conflicts: fs/xfs/xfs_buf.c Signed-off-by: Hajime Tazaki <thehajime@gmail.com>
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/* 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>
|
|
|
|
#ifndef CONFIG_64BIT
|
|
typedef struct {
|
|
s64 counter;
|
|
} atomic64_t;
|
|
#endif
|
|
|
|
#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 */
|