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/* Public domain. */
#ifndef _LINUX_SPINLOCK_H
#define _LINUX_SPINLOCK_H
#include <linux/kernel.h>
#include <linux/spinlock_types.h>
#include <linux/preempt.h>
#include <linux/bottom_half.h>
#include <linux/atomic.h>
#define spin_lock_irqsave(_mtxp, _flags) do { \
_flags = 0; \
mtx_enter(_mtxp); \
} while (0)
#define spin_lock_irqsave_nested(_mtxp, _flags, _subclass) do { \
(void)(_subclass); \
_flags = 0; \
mtx_enter(_mtxp); \
} while (0)
#define spin_unlock_irqrestore(_mtxp, _flags) do { \
(void)(_flags); \
mtx_leave(_mtxp); \
} while (0)
#define spin_trylock_irqsave(_mtxp, _flags) \
({ \
(void)(_flags); \
mtx_enter_try(_mtxp) ? 1 : 0; \
})
static inline int
atomic_dec_and_lock(volatile int *v, struct mutex *mtxp)
{
if (*v != 1) {
atomic_dec(v);
return 0;
}
mtx_enter(mtxp);
atomic_dec(v);
return 1;
}
#define atomic_dec_and_lock_irqsave(_a, _mtxp, _flags) \
atomic_dec_and_lock(_a, _mtxp)
#define spin_lock(mtxp) mtx_enter(mtxp)
#define spin_lock_nested(mtxp, l) mtx_enter(mtxp)
#define spin_unlock(mtxp) mtx_leave(mtxp)
#define spin_lock_irq(mtxp) mtx_enter(mtxp)
#define spin_unlock_irq(mtxp) mtx_leave(mtxp)
#define assert_spin_locked(mtxp) MUTEX_ASSERT_LOCKED(mtxp)
#define spin_trylock_irq(mtxp) mtx_enter_try(mtxp)
#define read_lock(mtxp) mtx_enter(mtxp)
#define read_unlock(mtxp) mtx_leave(mtxp)
#define write_lock(mtxp) mtx_enter(mtxp)
#define write_unlock(mtxp) mtx_leave(mtxp)
#endif
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