spinlock.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#ifndef ARCH_SMP_SPINLOCK_H
#define ARCH_SMP_SPINLOCK_H
 
#include <arch/barrier.h>
#include <arch/smp/atomic.h>
 
typedef struct {
        atomic_t lock;
} spinlock_t;
 
static inline void spinlock_lock(spinlock_t *lock)
{
        while (atomic_swap(&lock->lock, -1))
                ;
        barrier();
}
 
static inline void spinlock_unlock(spinlock_t *lock)
{
        barrier();
        atomic_set(&lock->lock, 0);
}
 
#endif // ARCH_SMP_SPINLOCK_H