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   1 #ifndef __LINUX_SPINLOCK_TYPES_H
   2 #define __LINUX_SPINLOCK_TYPES_H
   3
   4 /*
   5  * include/linux/spinlock_types.h - generic spinlock type definitions
   6  *                                  and initializers
   7  *
   8  * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
   9  * Released under the General Public License (GPL).
  10  */
  11
  12 #if defined(CONFIG_SMP)
  13 # include <asm/spinlock_types.h>
  14 #else
  15 # include <linux/spinlock_types_up.h>
  16 #endif
  17
  18 #include <linux/lockdep.h>
  19
  20 typedef struct {
  21         arch_spinlock_t raw_lock;
  22 #ifdef CONFIG_GENERIC_LOCKBREAK
  23         unsigned int break_lock;
  24 #endif
  25 #ifdef CONFIG_DEBUG_SPINLOCK
  26         unsigned int magic, owner_cpu;
  27         void *owner;
  28 #endif
  29 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  30         struct lockdep_map dep_map;
  31 #endif
  32 } spinlock_t;
  33
  34 #define SPINLOCK_MAGIC          0xdead4ead
  35
  36 #define SPINLOCK_OWNER_INIT     ((void *)-1L)
  37
  38 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  39 # define SPIN_DEP_MAP_INIT(lockname)    .dep_map = { .name = #lockname }
  40 #else
  41 # define SPIN_DEP_MAP_INIT(lockname)
  42 #endif
  43
  44 #ifdef CONFIG_DEBUG_SPINLOCK
  45 # define __SPIN_LOCK_UNLOCKED(lockname)                                 \
  46         (spinlock_t)    {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED,   \
  47                                 .magic = SPINLOCK_MAGIC,                \
  48                                 .owner = SPINLOCK_OWNER_INIT,           \
  49                                 .owner_cpu = -1,                        \
  50                                 SPIN_DEP_MAP_INIT(lockname) }
  51 #else
  52 # define __SPIN_LOCK_UNLOCKED(lockname) \
  53         (spinlock_t)    {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED,   \
  54                                 SPIN_DEP_MAP_INIT(lockname) }
  55 #endif
  56
  57 /*
  58  * SPIN_LOCK_UNLOCKED defeats lockdep state tracking and is hence
  59  * deprecated.
  60  * Please use DEFINE_SPINLOCK() or __SPIN_LOCK_UNLOCKED() as
  61  * appropriate.
  62  */
  63 #define SPIN_LOCK_UNLOCKED      __SPIN_LOCK_UNLOCKED(old_style_spin_init)
  64
  65 #define DEFINE_SPINLOCK(x)      spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
  66
  67 #include <linux/rwlock_types.h>
  68
  69 #endif /* __LINUX_SPINLOCK_TYPES_H */