kernel/include/linux/spinlock_types_rt.h

   1 #ifndef __LINUX_SPINLOCK_TYPES_RT_H
   2 #define __LINUX_SPINLOCK_TYPES_RT_H
   3
   4 #ifndef __LINUX_SPINLOCK_TYPES_H
   5 #error "Do not include directly. Include spinlock_types.h instead"
   6 #endif
   7
   8 #include <linux/cache.h>
   9
  10 /*
  11  * PREEMPT_RT: spinlocks - an RT mutex plus lock-break field:
  12  */
  13 typedef struct spinlock {
  14         struct rt_mutex         lock;
  15         unsigned int            break_lock;
  16 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  17         struct lockdep_map      dep_map;
  18 #endif
  19 } spinlock_t;
  20
  21 #ifdef CONFIG_DEBUG_RT_MUTEXES
  22 # define __RT_SPIN_INITIALIZER(name) \
  23         { \
  24         .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(name.wait_lock), \
  25         .save_state = 1, \
  26         .file = __FILE__, \
  27         .line = __LINE__ , \
  28         }
  29 #else
  30 # define __RT_SPIN_INITIALIZER(name) \
  31         {                                                               \
  32         .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(name.wait_lock),          \
  33         .save_state = 1, \
  34         }
  35 #endif
  36
  37 /*
  38 .wait_list = PLIST_HEAD_INIT_RAW((name).lock.wait_list, (name).lock.wait_lock)
  39 */
  40
  41 #define __SPIN_LOCK_UNLOCKED(name)                      \
  42         { .lock = __RT_SPIN_INITIALIZER(name.lock),             \
  43           SPIN_DEP_MAP_INIT(name) }
  44
  45 #define __DEFINE_SPINLOCK(name) \
  46         spinlock_t name = __SPIN_LOCK_UNLOCKED(name)
  47
  48 #define DEFINE_SPINLOCK(name) \
  49         spinlock_t name __cacheline_aligned_in_smp = __SPIN_LOCK_UNLOCKED(name)
  50
  51 #endif