/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_GENERIC_QRWLOCK_TYPES_H
#define __ASM_GENERIC_QRWLOCK_TYPES_H

#include <linux/types.h>
#include <asm/byteorder.h>
#include <asm/spinlock_types.h>

/*
 * The queued read/write lock data structure
 */

typedef struct qrwlock {
        union {
                atomic_t cnts;
                struct {
#ifdef __LITTLE_ENDIAN
                        u8 wlocked;     /* Locked for write? */
                        u8 __lstate[3];
#else
                        u8 __lstate[3];
                        u8 wlocked;     /* Locked for write? */
#endif
                };
        };
        arch_spinlock_t         wait_lock;
} arch_rwlock_t;

#define __ARCH_RW_LOCK_UNLOCKED {               \
        { .cnts = ATOMIC_INIT(0), },            \
        .wait_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
}

#endif /* __ASM_GENERIC_QRWLOCK_TYPES_H */