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 */
29