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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_MICROBLAZE_ATOMIC_H
3#define _ASM_MICROBLAZE_ATOMIC_H
4
5#include <asm/cmpxchg.h>
6#include <asm-generic/atomic.h>
7#include <asm-generic/atomic64.h>
8
9/*
10 * Atomically test *v and decrement if it is greater than 0.
11 * The function returns the old value of *v minus 1.
12 */
13static inline int atomic_dec_if_positive(atomic_t *v)
14{
15 unsigned long flags;
16 int res;
17
18 local_irq_save(flags);
19 res = v->counter - 1;
20 if (res >= 0)
21 v->counter = res;
22 local_irq_restore(flags);
23
24 return res;
25}
26#define atomic_dec_if_positive atomic_dec_if_positive
27
28#endif /* _ASM_MICROBLAZE_ATOMIC_H */