kernel/include/linux/spinlock_types_raw.h

   1 #ifndef __LINUX_SPINLOCK_TYPES_RAW_H
   2 #define __LINUX_SPINLOCK_TYPES_RAW_H
   3
   4 #if defined(CONFIG_SMP)
   5 # include <asm/spinlock_types.h>
   6 #else
   7 # include <linux/spinlock_types_up.h>
   8 #endif
   9
  10 #include <linux/lockdep.h>
  11
  12 typedef struct raw_spinlock {
  13         arch_spinlock_t raw_lock;
  14 #ifdef CONFIG_GENERIC_LOCKBREAK
  15         unsigned int break_lock;
  16 #endif
  17 #ifdef CONFIG_DEBUG_SPINLOCK
  18         unsigned int magic, owner_cpu;
  19         void *owner;
  20 #endif
  21 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  22         struct lockdep_map dep_map;
  23 #endif
  24 } raw_spinlock_t;
  25
  26 #define SPINLOCK_MAGIC          0xdead4ead
  27
  28 #define SPINLOCK_OWNER_INIT     ((void *)-1L)
  29
  30 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  31 # define SPIN_DEP_MAP_INIT(lockname)    .dep_map = { .name = #lockname }
  32 #else
  33 # define SPIN_DEP_MAP_INIT(lockname)
  34 #endif
  35
  36 #ifdef CONFIG_DEBUG_SPINLOCK
  37 # define SPIN_DEBUG_INIT(lockname)              \
  38         .magic = SPINLOCK_MAGIC,                \
  39         .owner_cpu = -1,                        \
  40         .owner = SPINLOCK_OWNER_INIT,
  41 #else
  42 # define SPIN_DEBUG_INIT(lockname)
  43 #endif
  44
  45 #define __RAW_SPIN_LOCK_INITIALIZER(lockname)   \
  46         {                                       \
  47         .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED,  \
  48         SPIN_DEBUG_INIT(lockname)               \
  49         SPIN_DEP_MAP_INIT(lockname) }
  50
  51 #define __RAW_SPIN_LOCK_UNLOCKED(lockname)      \
  52         (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
  53
  54 #define DEFINE_RAW_SPINLOCK(x)  raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
  55
  56 #endif