| #ifndef _ASM_MICROBLAZE_ATOMIC_H | |
| #define _ASM_MICROBLAZE_ATOMIC_H | |
| #include <asm-generic/atomic.h> | |
| #include <asm-generic/atomic64.h> | |
| /* | |
| * Atomically test *v and decrement if it is greater than 0. | |
| * The function returns the old value of *v minus 1. | |
| */ | |
| static inline int atomic_dec_if_positive(atomic_t *v) | |
| { | |
| unsigned long flags; | |
| int res; | |
| local_irq_save(flags); | |
| res = v->counter - 1; | |
| if (res >= 0) | |
| v->counter = res; | |
| local_irq_restore(flags); | |
| return res; | |
| } | |
| #endif /* _ASM_MICROBLAZE_ATOMIC_H */ |