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1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright IBM Corp. 1999, 2016
4 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
9 #ifndef __ARCH_S390_ATOMIC__
10 #define __ARCH_S390_ATOMIC__
12 #include <linux/compiler.h>
13 #include <linux/types.h>
14 #include <asm/atomic_ops.h>
15 #include <asm/barrier.h>
16 #include <asm/cmpxchg.h>
18 #define ATOMIC_INIT(i) { (i) }
20 static inline int atomic_read(const atomic_t
*v
)
26 : "=d" (c
) : "Q" (v
->counter
));
30 static inline void atomic_set(atomic_t
*v
, int i
)
34 : "=Q" (v
->counter
) : "d" (i
));
37 static inline int atomic_add_return(int i
, atomic_t
*v
)
39 return __atomic_add_barrier(i
, &v
->counter
) + i
;
42 static inline int atomic_fetch_add(int i
, atomic_t
*v
)
44 return __atomic_add_barrier(i
, &v
->counter
);
47 static inline void atomic_add(int i
, atomic_t
*v
)
49 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
50 if (__builtin_constant_p(i
) && (i
> -129) && (i
< 128)) {
51 __atomic_add_const(i
, &v
->counter
);
55 __atomic_add(i
, &v
->counter
);
58 #define atomic_sub(_i, _v) atomic_add(-(int)(_i), _v)
59 #define atomic_sub_return(_i, _v) atomic_add_return(-(int)(_i), _v)
60 #define atomic_fetch_sub(_i, _v) atomic_fetch_add(-(int)(_i), _v)
62 #define ATOMIC_OPS(op) \
63 static inline void atomic_##op(int i, atomic_t *v) \
65 __atomic_##op(i, &v->counter); \
67 static inline int atomic_fetch_##op(int i, atomic_t *v) \
69 return __atomic_##op##_barrier(i, &v->counter); \
78 #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
80 static inline int atomic_cmpxchg(atomic_t
*v
, int old
, int new)
82 return __atomic_cmpxchg(&v
->counter
, old
, new);
85 #define ATOMIC64_INIT(i) { (i) }
87 static inline s64
atomic64_read(const atomic64_t
*v
)
93 : "=d" (c
) : "Q" (v
->counter
));
97 static inline void atomic64_set(atomic64_t
*v
, s64 i
)
101 : "=Q" (v
->counter
) : "d" (i
));
104 static inline s64
atomic64_add_return(s64 i
, atomic64_t
*v
)
106 return __atomic64_add_barrier(i
, (long *)&v
->counter
) + i
;
109 static inline s64
atomic64_fetch_add(s64 i
, atomic64_t
*v
)
111 return __atomic64_add_barrier(i
, (long *)&v
->counter
);
114 static inline void atomic64_add(s64 i
, atomic64_t
*v
)
116 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
117 if (__builtin_constant_p(i
) && (i
> -129) && (i
< 128)) {
118 __atomic64_add_const(i
, (long *)&v
->counter
);
122 __atomic64_add(i
, (long *)&v
->counter
);
125 #define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
127 static inline s64
atomic64_cmpxchg(atomic64_t
*v
, s64 old
, s64
new)
129 return __atomic64_cmpxchg((long *)&v
->counter
, old
, new);
132 #define ATOMIC64_OPS(op) \
133 static inline void atomic64_##op(s64 i, atomic64_t *v) \
135 __atomic64_##op(i, (long *)&v->counter); \
137 static inline long atomic64_fetch_##op(s64 i, atomic64_t *v) \
139 return __atomic64_##op##_barrier(i, (long *)&v->counter); \
148 #define atomic64_sub_return(_i, _v) atomic64_add_return(-(s64)(_i), _v)
149 #define atomic64_fetch_sub(_i, _v) atomic64_fetch_add(-(s64)(_i), _v)
150 #define atomic64_sub(_i, _v) atomic64_add(-(s64)(_i), _v)
152 #endif /* __ARCH_S390_ATOMIC__ */