arch/mips/include/asm/spinlock_types.h

#ifndef _ASM_SPINLOCK_TYPES_H
#define _ASM_SPINLOCK_TYPES_H

#ifndef __LINUX_SPINLOCK_TYPES_H
# error "please don't include this file directly"
#endif

typedef struct {
	/*
	 * bits  0..13: serving_now
	 * bits 14    : junk data
	 * bits 15..28: ticket
	 */
	unsigned int lock;
} raw_spinlock_t;

#define __RAW_SPIN_LOCK_UNLOCKED	{ 0 }

typedef struct {
	volatile unsigned int lock;
} raw_rwlock_t;

#define __RAW_RW_LOCK_UNLOCKED		{ 0 }

#endif