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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#ifndef ARCH_SMP_SPINLOCK_H
#define ARCH_SMP_SPINLOCK_H
#include <arch/encoding.h>
#include <arch/smp/atomic.h>
#define barrier() { asm volatile ("fence" ::: "memory"); }
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
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