43 static inline void atomic_##op(int i, atomic_t *v)			\
47 	c = v->counter;							\
48 	while ((old = cmpxchg(&v->counter, c, c c_op i)) != c)		\
53 static inline int atomic_##op##_return(int i, atomic_t *v)		\
57 	c = v->counter;							\
58 	while ((old = cmpxchg(&v->counter, c, c c_op i)) != c)		\
69 static inline void atomic_##op(int i, atomic_t *v)			\
74 	v->counter = v->counter c_op i;					\
79 static inline int atomic_##op##_return(int i, atomic_t *v)		\
85 	ret = (v->counter = v->counter c_op i);				\
130 #define atomic_read(v)	READ_ONCE((v)->counter)  argument
140 #define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))  argument
144 static inline int atomic_add_negative(int i, atomic_t *v)  in atomic_add_negative()  argument
146 	return atomic_add_return(i, v) < 0;  in atomic_add_negative()
149 static inline void atomic_add(int i, atomic_t *v)  in atomic_add()  argument
151 	atomic_add_return(i, v);  in atomic_add()
154 static inline void atomic_sub(int i, atomic_t *v)  in atomic_sub()  argument
156 	atomic_sub_return(i, v);  in atomic_sub()
159 static inline void atomic_inc(atomic_t *v)  in atomic_inc()  argument
161 	atomic_add_return(1, v);  in atomic_inc()
164 static inline void atomic_dec(atomic_t *v)  in atomic_dec()  argument
166 	atomic_sub_return(1, v);  in atomic_dec()
169 #define atomic_dec_return(v)		atomic_sub_return(1, (v))  argument
170 #define atomic_inc_return(v)		atomic_add_return(1, (v))  argument
172 #define atomic_sub_and_test(i, v)	(atomic_sub_return((i), (v)) == 0)  argument
173 #define atomic_dec_and_test(v)		(atomic_dec_return(v) == 0)  argument
174 #define atomic_inc_and_test(v)		(atomic_inc_return(v) == 0)  argument
176 #define atomic_xchg(ptr, v)		(xchg(&(ptr)->counter, (v)))  argument
177 #define atomic_cmpxchg(v, old, new)	(cmpxchg(&((v)->counter), (old), (new)))  argument
179 static inline int __atomic_add_unless(atomic_t *v, int a, int u)  in __atomic_add_unless()  argument
182 	c = atomic_read(v);  in __atomic_add_unless()
183 	while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c)  in __atomic_add_unless()