LXR linux/arch/x86/include/asm/spinlock

   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)
  11typedef u8  __ticket_t;
  12typedef u16 __ticketpair_t;
  13#else
  14typedef u16 __ticket_t;
  15typedef u32 __ticketpair_t;
  16#endif
  17
  18#define TICKET_SHIFT    (sizeof(__ticket_t) * 8)
  19
  20typedef struct arch_spinlock {
  21        union {
  22                __ticketpair_t head_tail;
  23                struct __raw_tickets {
  24                        __ticket_t head, tail;
  25                } tickets;
  26        };
  27} arch_spinlock_t;
  28
  29#define __ARCH_SPIN_LOCK_UNLOCKED       { { 0 } }
  30
  31#include <asm/rwlock.h>
  32
  33#endif /* _ASM_X86_SPINLOCK_TYPES_H */
  34