blob: 42ac382a09daf3109fbcad4a2f7ba96ffd1a8de5 [file] [log] [blame]
#ifndef _ASM_MICROBLAZE_ATOMIC_H
#define _ASM_MICROBLAZE_ATOMIC_H
#include <asm/cmpxchg.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;
}
#define atomic_dec_if_positive atomic_dec_if_positive
#endif /* _ASM_MICROBLAZE_ATOMIC_H */