kernel/include/linux/spinlock_types_nort.h

   1 #ifndef __LINUX_SPINLOCK_TYPES_NORT_H
   2 #define __LINUX_SPINLOCK_TYPES_NORT_H
   3
   4 #ifndef __LINUX_SPINLOCK_TYPES_H
   5 #error "Do not include directly. Include spinlock_types.h instead"
   6 #endif
   7
   8 /*
   9  * The non RT version maps spinlocks to raw_spinlocks
  10  */
  11 typedef struct spinlock {
  12         union {
  13                 struct raw_spinlock rlock;
  14
  15 #ifdef CONFIG_DEBUG_LOCK_ALLOC
  16 # define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
  17                 struct {
  18                         u8 __padding[LOCK_PADSIZE];
  19                         struct lockdep_map dep_map;
  20                 };
  21 #endif
  22         };
  23 } spinlock_t;
  24
  25 #define __SPIN_LOCK_INITIALIZER(lockname) \
  26         { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
  27
  28 #define __SPIN_LOCK_UNLOCKED(lockname) \
  29         (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
  30
  31 #define DEFINE_SPINLOCK(x)      spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
  32
  33 #endif