include/linux/spinlock_types_up.h

   1 #ifndef __LINUX_SPINLOCK_TYPES_UP_H
   2 #define __LINUX_SPINLOCK_TYPES_UP_H
   3
   4 #ifndef __LINUX_SPINLOCK_TYPES_H
   5 # error "please don't include this file directly"
   6 #endif
   7
   8 /*
   9  * include/linux/spinlock_types_up.h - spinlock type definitions for UP
  10  *
  11  * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
  12  * Released under the General Public License (GPL).
  13  */
  14
  15 #ifdef CONFIG_DEBUG_SPINLOCK
  16
  17 typedef struct {
  18         volatile unsigned int slock;
  19 } raw_spinlock_t;
  20
  21 #define __RAW_SPIN_LOCK_UNLOCKED { 1 }
  22
  23 #else
  24
  25 /*
  26  * All gcc 2.95 versions and early versions of 2.96 have a nasty bug
  27  * with empty initializers.
  28  */
  29 #if (__GNUC__ > 2)
  30 typedef struct { } raw_spinlock_t;
  31
  32 #define __RAW_SPIN_LOCK_UNLOCKED { }
  33 #else
  34 typedef struct { int gcc_is_buggy; } raw_spinlock_t;
  35 #define __RAW_SPIN_LOCK_UNLOCKED (raw_spinlock_t) { 0 }
  36 #endif
  37
  38 #endif
  39
  40 #if (__GNUC__ > 2)
  41 typedef struct {
  42         /* no debug version on UP */
  43 } raw_rwlock_t;
  44
  45 #define __RAW_RW_LOCK_UNLOCKED { }
  46 #else
  47 typedef struct { int gcc_is_buggy; } raw_rwlock_t;
  48 #define __RAW_RW_LOCK_UNLOCKED (raw_rwlock_t) { 0 }
  49 #endif
  50
  51 #endif /* __LINUX_SPINLOCK_TYPES_UP_H */