atomic.h

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#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 */