root/include/linux/spinlock_api_up.h

INCLUDED FROM

   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_raw_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 { __acquire(lock); (void)(lock); } while (0)
  29 
  30 #define __LOCK(lock) \
  31   do { preempt_disable(); ___LOCK(lock); } while (0)
  32 
  33 #define __LOCK_BH(lock) \
  34   do { __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); ___LOCK(lock); } while (0)
  35 
  36 #define __LOCK_IRQ(lock) \
  37   do { local_irq_disable(); __LOCK(lock); } while (0)
  38 
  39 #define __LOCK_IRQSAVE(lock, flags) \
  40   do { local_irq_save(flags); __LOCK(lock); } while (0)
  41 
  42 #define ___UNLOCK(lock) \
  43   do { __release(lock); (void)(lock); } while (0)
  44 
  45 #define __UNLOCK(lock) \
  46   do { preempt_enable(); ___UNLOCK(lock); } while (0)
  47 
  48 #define __UNLOCK_BH(lock) \
  49   do { __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); \
  50        ___UNLOCK(lock); } while (0)
  51 
  52 #define __UNLOCK_IRQ(lock) \
  53   do { local_irq_enable(); __UNLOCK(lock); } while (0)
  54 
  55 #define __UNLOCK_IRQRESTORE(lock, flags) \
  56   do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
  57 
  58 #define _raw_spin_lock(lock)                    __LOCK(lock)
  59 #define _raw_spin_lock_nested(lock, subclass)   __LOCK(lock)
  60 #define _raw_read_lock(lock)                    __LOCK(lock)
  61 #define _raw_write_lock(lock)                   __LOCK(lock)
  62 #define _raw_spin_lock_bh(lock)                 __LOCK_BH(lock)
  63 #define _raw_read_lock_bh(lock)                 __LOCK_BH(lock)
  64 #define _raw_write_lock_bh(lock)                __LOCK_BH(lock)
  65 #define _raw_spin_lock_irq(lock)                __LOCK_IRQ(lock)
  66 #define _raw_read_lock_irq(lock)                __LOCK_IRQ(lock)
  67 #define _raw_write_lock_irq(lock)               __LOCK_IRQ(lock)
  68 #define _raw_spin_lock_irqsave(lock, flags)     __LOCK_IRQSAVE(lock, flags)
  69 #define _raw_read_lock_irqsave(lock, flags)     __LOCK_IRQSAVE(lock, flags)
  70 #define _raw_write_lock_irqsave(lock, flags)    __LOCK_IRQSAVE(lock, flags)
  71 #define _raw_spin_trylock(lock)                 ({ __LOCK(lock); 1; })
  72 #define _raw_read_trylock(lock)                 ({ __LOCK(lock); 1; })
  73 #define _raw_write_trylock(lock)                        ({ __LOCK(lock); 1; })
  74 #define _raw_spin_trylock_bh(lock)              ({ __LOCK_BH(lock); 1; })
  75 #define _raw_spin_unlock(lock)                  __UNLOCK(lock)
  76 #define _raw_read_unlock(lock)                  __UNLOCK(lock)
  77 #define _raw_write_unlock(lock)                 __UNLOCK(lock)
  78 #define _raw_spin_unlock_bh(lock)               __UNLOCK_BH(lock)
  79 #define _raw_write_unlock_bh(lock)              __UNLOCK_BH(lock)
  80 #define _raw_read_unlock_bh(lock)               __UNLOCK_BH(lock)
  81 #define _raw_spin_unlock_irq(lock)              __UNLOCK_IRQ(lock)
  82 #define _raw_read_unlock_irq(lock)              __UNLOCK_IRQ(lock)
  83 #define _raw_write_unlock_irq(lock)             __UNLOCK_IRQ(lock)
  84 #define _raw_spin_unlock_irqrestore(lock, flags) \
  85                                         __UNLOCK_IRQRESTORE(lock, flags)
  86 #define _raw_read_unlock_irqrestore(lock, flags) \
  87                                         __UNLOCK_IRQRESTORE(lock, flags)
  88 #define _raw_write_unlock_irqrestore(lock, flags) \
  89                                         __UNLOCK_IRQRESTORE(lock, flags)
  90 
  91 #endif /* __LINUX_SPINLOCK_API_UP_H */