1 #ifndef _ASM_X86_SPINLOCK_TYPES_H
2 #define _ASM_X86_SPINLOCK_TYPES_H
3 
4 #include <linux/types.h>
5 
6 #ifdef CONFIG_PARAVIRT_SPINLOCKS
7 #define __TICKET_LOCK_INC	2
8 #else
9 #define __TICKET_LOCK_INC	1
10 #endif
11 
12 #if (CONFIG_NR_CPUS < (256 / __TICKET_LOCK_INC))
13 typedef u8  __ticket_t;
14 typedef u16 __ticketpair_t;
15 #else
16 typedef u16 __ticket_t;
17 typedef u32 __ticketpair_t;
18 #endif
19 
20 #define TICKET_LOCK_INC	((__ticket_t)__TICKET_LOCK_INC)
21 
22 #define TICKET_SHIFT	(sizeof(__ticket_t) * 8)
23 
24 typedef struct arch_spinlock {
25 	union {
26 		__ticketpair_t head_tail;
27 		struct __raw_tickets {
28 			__ticket_t head, tail;
29 		} tickets;
30 	};
31 } arch_spinlock_t;
32 
33 #define __ARCH_SPIN_LOCK_UNLOCKED	{ { 0 } }
34 
35 #include <asm/rwlock.h>
36 
37 #endif /* _ASM_X86_SPINLOCK_TYPES_H */
38