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   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 suppress compiler warnings of unused lock
  25  * variables, and to add the proper checker annotations:
  26  */
  27 #define __LOCK(lock) \
  28   do { preempt_disable(); __acquire(lock); (void)(lock); } while (0)
  29
  30 #define __LOCK_BH(lock) \
  31   do { local_bh_disable(); __LOCK(lock); } while (0)
  32
  33 #define __LOCK_IRQ(lock) \
  34   do { local_irq_disable(); __LOCK(lock); } while (0)
  35
  36 #define __LOCK_IRQSAVE(lock, flags) \
  37   do { local_irq_save(flags); __LOCK(lock); } while (0)
  38
  39 #define __UNLOCK(lock) \
  40   do { preempt_enable(); __release(lock); (void)(lock); } while (0)
  41
  42 #define __UNLOCK_BH(lock) \
  43   do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0)
  44
  45 #define __UNLOCK_IRQ(lock) \
  46   do { local_irq_enable(); __UNLOCK(lock); } while (0)
  47
  48 #define __UNLOCK_IRQRESTORE(lock, flags) \
  49   do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
  50
  51 #define _spin_lock(lock)                        __LOCK(lock)
  52 #define _spin_lock_nested(lock, subclass)       __LOCK(lock)
  53 #define _read_lock(lock)                        __LOCK(lock)
  54 #define _write_lock(lock)                       __LOCK(lock)
  55 #define _spin_lock_bh(lock)                     __LOCK_BH(lock)
  56 #define _read_lock_bh(lock)                     __LOCK_BH(lock)
  57 #define _write_lock_bh(lock)                    __LOCK_BH(lock)
  58 #define _spin_lock_irq(lock)                    __LOCK_IRQ(lock)
  59 #define _read_lock_irq(lock)                    __LOCK_IRQ(lock)
  60 #define _write_lock_irq(lock)                   __LOCK_IRQ(lock)
  61 #define _spin_lock_irqsave(lock, flags)         __LOCK_IRQSAVE(lock, flags)
  62 #define _read_lock_irqsave(lock, flags)         __LOCK_IRQSAVE(lock, flags)
  63 #define _write_lock_irqsave(lock, flags)        __LOCK_IRQSAVE(lock, flags)
  64 #define _spin_trylock(lock)                     ({ __LOCK(lock); 1; })
  65 #define _read_trylock(lock)                     ({ __LOCK(lock); 1; })
  66 #define _write_trylock(lock)                    ({ __LOCK(lock); 1; })
  67 #define _spin_trylock_bh(lock)                  ({ __LOCK_BH(lock); 1; })
  68 #define _spin_unlock(lock)                      __UNLOCK(lock)
  69 #define _read_unlock(lock)                      __UNLOCK(lock)
  70 #define _write_unlock(lock)                     __UNLOCK(lock)
  71 #define _spin_unlock_bh(lock)                   __UNLOCK_BH(lock)
  72 #define _write_unlock_bh(lock)                  __UNLOCK_BH(lock)
  73 #define _read_unlock_bh(lock)                   __UNLOCK_BH(lock)
  74 #define _spin_unlock_irq(lock)                  __UNLOCK_IRQ(lock)
  75 #define _read_unlock_irq(lock)                  __UNLOCK_IRQ(lock)
  76 #define _write_unlock_irq(lock)                 __UNLOCK_IRQ(lock)
  77 #define _spin_unlock_irqrestore(lock, flags)    __UNLOCK_IRQRESTORE(lock, flags)
  78 #define _read_unlock_irqrestore(lock, flags)    __UNLOCK_IRQRESTORE(lock, flags)
  79 #define _write_unlock_irqrestore(lock, flags)   __UNLOCK_IRQRESTORE(lock, flags)
  80
  81 #endif /* __LINUX_SPINLOCK_API_UP_H */