1 #ifndef _ASM_X86_SPINLOCK_TYPES_H
2 #define _ASM_X86_SPINLOCK_TYPES_H
3 
4 #include <linux/types.h>
5 
6 #if (CONFIG_NR_CPUS < 256)
7 typedef u8  __ticket_t;
8 typedef u16 __ticketpair_t;
9 #else
10 typedef u16 __ticket_t;
11 typedef u32 __ticketpair_t;
12 #endif
13 
14 #define TICKET_SHIFT	(sizeof(__ticket_t) * 8)
15 
16 typedef struct arch_spinlock {
17 	union {
18 		__ticketpair_t head_tail;
19 		struct __raw_tickets {
20 			__ticket_t head, tail;
21 		} tickets;
22 	};
23 } arch_spinlock_t;
24 
25 #define __ARCH_SPIN_LOCK_UNLOCKED	{ { 0 } }
26 
27 #include <asm/rwlock.h>
28 
29 #endif /* _ASM_X86_SPINLOCK_TYPES_H */
30