aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/include/asm/spinlock_types.h
blob: ad0ad07fc006d08fa180b25a1a5c2b1a61664a38 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
#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 */