1 #ifndef _ASM_X86_SPINLOCK_TYPES_H 2 #define _ASM_X86_SPINLOCK_TYPES_H 3 4 #ifndef __LINUX_SPINLOCK_TYPES_H 5 # error "please don't include this file directly" 6 #endif 7 8 #include <linux/types.h> 9 10 #if (CONFIG_NR_CPUS < 256) 11 typedef u8 __ticket_t; 12 #else 13 typedef u16 __ticket_t; 14 #endif 15 16 #define TICKET_SHIFT (sizeof(__ticket_t) * 8) 17 #define TICKET_MASK ((__ticket_t)((1 << TICKET_SHIFT) - 1)) 18 19 typedef struct arch_spinlock { 20 union { 21 unsigned int slock; 22 struct __raw_tickets { 23 __ticket_t head, tail; 24 } tickets; 25 }; 26 } arch_spinlock_t; 27 28 #define __ARCH_SPIN_LOCK_UNLOCKED { { .slock = 0 } } 29 30 #include <asm/rwlock.h> 31 32 #endif /* _ASM_X86_SPINLOCK_TYPES_H */ 33