LXR linux/include/linux/spinlock_api

   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_spin_lock_bh_nested(lock, subclass) __LOCK(lock)
  61#define _raw_read_lock(lock)                    __LOCK(lock)
  62#define _raw_write_lock(lock)                   __LOCK(lock)
  63#define _raw_spin_lock_bh(lock)                 __LOCK_BH(lock)
  64#define _raw_read_lock_bh(lock)                 __LOCK_BH(lock)
  65#define _raw_write_lock_bh(lock)                __LOCK_BH(lock)
  66#define _raw_spin_lock_irq(lock)                __LOCK_IRQ(lock)
  67#define _raw_read_lock_irq(lock)                __LOCK_IRQ(lock)
  68#define _raw_write_lock_irq(lock)               __LOCK_IRQ(lock)
  69#define _raw_spin_lock_irqsave(lock, flags)     __LOCK_IRQSAVE(lock, flags)
  70#define _raw_read_lock_irqsave(lock, flags)     __LOCK_IRQSAVE(lock, flags)
  71#define _raw_write_lock_irqsave(lock, flags)    __LOCK_IRQSAVE(lock, flags)
  72#define _raw_spin_trylock(lock)                 ({ __LOCK(lock); 1; })
  73#define _raw_read_trylock(lock)                 ({ __LOCK(lock); 1; })
  74#define _raw_write_trylock(lock)                        ({ __LOCK(lock); 1; })
  75#define _raw_spin_trylock_bh(lock)              ({ __LOCK_BH(lock); 1; })
  76#define _raw_spin_unlock(lock)                  __UNLOCK(lock)
  77#define _raw_read_unlock(lock)                  __UNLOCK(lock)
  78#define _raw_write_unlock(lock)                 __UNLOCK(lock)
  79#define _raw_spin_unlock_bh(lock)               __UNLOCK_BH(lock)
  80#define _raw_write_unlock_bh(lock)              __UNLOCK_BH(lock)
  81#define _raw_read_unlock_bh(lock)               __UNLOCK_BH(lock)
  82#define _raw_spin_unlock_irq(lock)              __UNLOCK_IRQ(lock)
  83#define _raw_read_unlock_irq(lock)              __UNLOCK_IRQ(lock)
  84#define _raw_write_unlock_irq(lock)             __UNLOCK_IRQ(lock)
  85#define _raw_spin_unlock_irqrestore(lock, flags) \
  86                                        __UNLOCK_IRQRESTORE(lock, flags)
  87#define _raw_read_unlock_irqrestore(lock, flags) \
  88                                        __UNLOCK_IRQRESTORE(lock, flags)
  89#define _raw_write_unlock_irqrestore(lock, flags) \
  90                                        __UNLOCK_IRQRESTORE(lock, flags)
  91
  92#endif /* __LINUX_SPINLOCK_API_UP_H */
  93