release/src-rt-6.x/linux/linux-2.6/include/linux/spinlock_api_up.h

   1 #ifndef __LINUX_SPINLOCK_API_UP_H
   2 #define __LINUX_SPINLOCK_API_UP_H
   3
   4 #ifndef __LINUX_SPINLOCK_H
   5 # error "please don't include this file directly"
   6 #endif
   7
   8 /*
   9  * include/linux/spinlock_api_up.h
  10  *
  11  * spinlock API implementation on UP-nondebug (inlined implementation)
  12  *
  13  * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
  14  * Released under the General Public License (GPL).
  15  */
  16
  17 #define in_lock_functions(ADDR)         0
  18
  19 #define assert_spin_locked(lock)        do { (void)(lock); } while (0)
  20
  21 /*
  22  * In the UP-nondebug case there's no real locking going on, so the
  23  * only thing we have to do is to keep the preempt counts and irq
  24  * flags straight, to supress compiler warnings of unused lock
  25  * variables, and to add the proper checker annotations:
  26  */
  27 #ifdef CONFIG_PREEMPT
  28 #define __LOCK(lock) \
  29   do { preempt_disable(); __acquire(lock); (void)(lock); } while (0)
  30 #else /* CONFIG_PREEMPT */
  31 #define __LOCK(lock) \
  32   (void)(lock)
  33 #endif
  34
  35 #define __LOCK_BH(lock) \
  36   do { local_bh_disable(); __LOCK(lock); } while (0)
  37
  38 #define __LOCK_IRQ(lock) \
  39   do { local_irq_disable(); __LOCK(lock); } while (0)
  40
  41 #define __LOCK_IRQSAVE(lock, flags) \
  42   do { local_irq_save(flags); __LOCK(lock); } while (0)
  43
  44 #ifdef  CONFIG_PREEMPT
  45 #define __UNLOCK(lock) \
  46   do { preempt_enable(); __release(lock); (void)(lock); } while (0)
  47 #else
  48 #define __UNLOCK(lock) \
  49         do { } while(0)
  50 #endif
  51
  52 #define __UNLOCK_BH(lock) \
  53   do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0)
  54
  55 #define __UNLOCK_IRQ(lock) \
  56   do { local_irq_enable(); __UNLOCK(lock); } while (0)
  57
  58 #define __UNLOCK_IRQRESTORE(lock, flags) \
  59   do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
  60
  61 #define _spin_lock(lock)                        __LOCK(lock)
  62 #define _spin_lock_nested(lock, subclass)       __LOCK(lock)
  63 #define _read_lock(lock)                        __LOCK(lock)
  64 #define _write_lock(lock)                       __LOCK(lock)
  65 #define _spin_lock_bh(lock)                     __LOCK_BH(lock)
  66 #define _read_lock_bh(lock)                     __LOCK_BH(lock)
  67 #define _write_lock_bh(lock)                    __LOCK_BH(lock)
  68 #define _spin_lock_irq(lock)                    __LOCK_IRQ(lock)
  69 #define _read_lock_irq(lock)                    __LOCK_IRQ(lock)
  70 #define _write_lock_irq(lock)                   __LOCK_IRQ(lock)
  71 #define _spin_lock_irqsave(lock, flags)         __LOCK_IRQSAVE(lock, flags)
  72 #define _read_lock_irqsave(lock, flags)         __LOCK_IRQSAVE(lock, flags)
  73 #define _write_lock_irqsave(lock, flags)        __LOCK_IRQSAVE(lock, flags)
  74 #define _spin_trylock(lock)                     ({ __LOCK(lock); 1; })
  75 #define _read_trylock(lock)                     ({ __LOCK(lock); 1; })
  76 #define _write_trylock(lock)                    ({ __LOCK(lock); 1; })
  77 #define _spin_trylock_bh(lock)                  ({ __LOCK_BH(lock); 1; })
  78 #define _spin_unlock(lock)                      __UNLOCK(lock)
  79 #define _read_unlock(lock)                      __UNLOCK(lock)
  80 #define _write_unlock(lock)                     __UNLOCK(lock)
  81 #define _spin_unlock_bh(lock)                   __UNLOCK_BH(lock)
  82 #define _write_unlock_bh(lock)                  __UNLOCK_BH(lock)
  83 #define _read_unlock_bh(lock)                   __UNLOCK_BH(lock)
  84 #define _spin_unlock_irq(lock)                  __UNLOCK_IRQ(lock)
  85 #define _read_unlock_irq(lock)                  __UNLOCK_IRQ(lock)
  86 #define _write_unlock_irq(lock)                 __UNLOCK_IRQ(lock)
  87 #define _spin_unlock_irqrestore(lock, flags)    __UNLOCK_IRQRESTORE(lock, flags)
  88 #define _read_unlock_irqrestore(lock, flags)    __UNLOCK_IRQRESTORE(lock, flags)
  89 #define _write_unlock_irqrestore(lock, flags)   __UNLOCK_IRQRESTORE(lock, flags)
  90
  91 #endif /* __LINUX_SPINLOCK_API_UP_H */