https://github.com/torvalds/linux
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Tip revision: 669df1b478803f49a356528d290af7bf442eb3be authored by Linus Torvalds on 01 January 2007, 00:53:20 UTC
Linux 2.6.20-rc3
Tip revision: 669df1b
spinlock_types.h
#ifndef __ASM_SH_SPINLOCK_TYPES_H
#define __ASM_SH_SPINLOCK_TYPES_H

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

typedef struct {
	volatile unsigned long lock;
} raw_spinlock_t;

#define __SPIN_LOCK_UNLOCKED		{ 0 }

typedef struct {
	raw_spinlock_t lock;
	atomic_t counter;
} raw_rwlock_t;

#define RW_LOCK_BIAS			0x01000000
#define __RAW_RW_LOCK_UNLOCKED		{ { 0 }, { RW_LOCK_BIAS } }

#endif
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