arch/mips/include/asm/spinlock_types.h

   1 #ifndef _ASM_SPINLOCK_TYPES_H
   2 #define _ASM_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 #include <asm/byteorder.h>
  11
  12 typedef union {
  13         /*
  14          * bits  0..15 : serving_now
  15          * bits 16..31 : ticket
  16          */
  17         u32 lock;
  18         struct {
  19 #ifdef __BIG_ENDIAN
  20                 u16 ticket;
  21                 u16 serving_now;
  22 #else
  23                 u16 serving_now;
  24                 u16 ticket;
  25 #endif
  26         } h;
  27 } arch_spinlock_t;
  28
  29 #define __ARCH_SPIN_LOCK_UNLOCKED       { .lock = 0 }
  30
  31 typedef struct {
  32         volatile unsigned int lock;
  33 } arch_rwlock_t;
  34
  35 #define __ARCH_RW_LOCK_UNLOCKED         { 0 }
  36
  37 #endif