blob: 615f53992c654e4f78625bf8708d5d92c7c12b09 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
#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 */
|
