1 #ifndef _ASM_MICROBLAZE_ATOMIC_H
2 #define _ASM_MICROBLAZE_ATOMIC_H
3 
4 #include <asm-generic/atomic.h>
5 #include <asm-generic/atomic64.h>
6 
7 /*
8  * Atomically test *v and decrement if it is greater than 0.
9  * The function returns the old value of *v minus 1.
10  */
atomic_dec_if_positive(atomic_t * v)11 static inline int atomic_dec_if_positive(atomic_t *v)
12 {
13 	unsigned long flags;
14 	int res;
15 
16 	local_irq_save(flags);
17 	res = v->counter - 1;
18 	if (res >= 0)
19 		v->counter = res;
20 	local_irq_restore(flags);
21 
22 	return res;
23 }
24 
25 #endif /* _ASM_MICROBLAZE_ATOMIC_H */
26