[deliverable/linux.git] / 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

#include <linux/types.h>

#if (CONFIG_NR_CPUS < 256)
typedef u8  __ticket_t;
typedef u16 __ticketpair_t;
#else
typedef u16 __ticket_t;
typedef u32 __ticketpair_t;
#endif

#define TICKET_SHIFT	(sizeof(__ticket_t) * 8)

typedef struct arch_spinlock {
	union {
		__ticketpair_t head_tail;
		struct __raw_tickets {
			__ticket_t head, tail;
		} tickets;
	};
} arch_spinlock_t;

#define __ARCH_SPIN_LOCK_UNLOCKED	{ { 0 } }

#include <asm/rwlock.h>

#endif /* _ASM_X86_SPINLOCK_TYPES_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_SPINLOCK_TYPES_H
1965aae3 PA	2	#define _ASM_X86_SPINLOCK_TYPES_H
fb1c8f93 IM	3
	4	#ifndef __LINUX_SPINLOCK_TYPES_H
	5	# error "please don't include this file directly"
	6	#endif
	7
84eb950d JF	8	#include <linux/types.h>
	9
	10	#if (CONFIG_NR_CPUS < 256)
	11	typedef u8 __ticket_t;
229855d6	12	typedef u16 __ticketpair_t;
84eb950d JF	13	#else
84eb950d JF	14	typedef u16 __ticket_t;
229855d6	15	typedef u32 __ticketpair_t;
84eb950d JF	16	#endif
	17
	18	#define TICKET_SHIFT (sizeof(__ticket_t) * 8)
84eb950d	19
445c8951	20	typedef struct arch_spinlock {
84eb950d	21	union {
229855d6	22	__ticketpair_t head_tail;
84eb950d JF	23	struct __raw_tickets {
	24	__ticket_t head, tail;
	25	} tickets;
	26	};
445c8951	27	} arch_spinlock_t;
fb1c8f93	28
229855d6	29	#define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } }
fb1c8f93	30
a750036f	31	#include <asm/rwlock.h>
fb1c8f93	32
1965aae3	33	#endif /* _ASM_X86_SPINLOCK_TYPES_H */