arch/x86/include/asm/spinlock_types.h

#ifndef _ASM_X86_SPINLOCK_TYPES_H
#define _ASM_X86_SPINLOCK_TYPES_H

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

typedef struct raw_spinlock {
	unsigned int slock;
} raw_spinlock_t;

#define __RAW_SPIN_LOCK_UNLOCKED	{ 0 }

typedef struct {
	unsigned int lock;
} raw_rwlock_t;

#define __RAW_RW_LOCK_UNLOCKED		{ RW_LOCK_BIAS }

#endif /* _ASM_X86_SPINLOCK_TYPES_H */