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include/linux/spinlock_types.h 2.05 KB
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fb1c8f93d   Ingo Molnar   [PATCH] spinlock ... 
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  #ifndef __LINUX_SPINLOCK_TYPES_H
  #define __LINUX_SPINLOCK_TYPES_H
  
  /*
   * include/linux/spinlock_types.h - generic spinlock type definitions
   *                                  and initializers
   *
   * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
   * Released under the General Public License (GPL).
   */
  
  #if defined(CONFIG_SMP)
  # include <asm/spinlock_types.h>
  #else
  # include <linux/spinlock_types_up.h>
  #endif
21f8ca3bf   Peter Zijlstra   fix raw_spinlock_... 
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  #include <linux/lockdep.h>
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  typedef struct raw_spinlock {
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  	arch_spinlock_t raw_lock;
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  #ifdef CONFIG_GENERIC_LOCKBREAK
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  	unsigned int break_lock;
  #endif
  #ifdef CONFIG_DEBUG_SPINLOCK
  	unsigned int magic, owner_cpu;
  	void *owner;
  #endif
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  #ifdef CONFIG_DEBUG_LOCK_ALLOC
  	struct lockdep_map dep_map;
  #endif
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  } raw_spinlock_t;
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  #define SPINLOCK_MAGIC		0xdead4ead
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  #define SPINLOCK_OWNER_INIT	((void *)-1L)
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  #ifdef CONFIG_DEBUG_LOCK_ALLOC
  # define SPIN_DEP_MAP_INIT(lockname)	.dep_map = { .name = #lockname }
  #else
  # define SPIN_DEP_MAP_INIT(lockname)
  #endif
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  #ifdef CONFIG_DEBUG_SPINLOCK
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  # define SPIN_DEBUG_INIT(lockname)		\
  	.magic = SPINLOCK_MAGIC,		\
  	.owner_cpu = -1,			\
  	.owner = SPINLOCK_OWNER_INIT,
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  #else
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  # define SPIN_DEBUG_INIT(lockname)
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  #endif
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  #define __RAW_SPIN_LOCK_INITIALIZER(lockname)	\
  	{					\
  	.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED,	\
  	SPIN_DEBUG_INIT(lockname)		\
  	SPIN_DEP_MAP_INIT(lockname) }
  
  #define __RAW_SPIN_LOCK_UNLOCKED(lockname)	\
  	(raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
  
  #define DEFINE_RAW_SPINLOCK(x)	raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
  
  typedef struct spinlock {
  	union {
  		struct raw_spinlock rlock;
  
  #ifdef CONFIG_DEBUG_LOCK_ALLOC
  # define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
  		struct {
  			u8 __padding[LOCK_PADSIZE];
  			struct lockdep_map dep_map;
  		};
  #endif
  	};
  } spinlock_t;
  
  #define __SPIN_LOCK_INITIALIZER(lockname) \
  	{ { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
  
  #define __SPIN_LOCK_UNLOCKED(lockname) \
  	(spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
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  #define DEFINE_SPINLOCK(x)	spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
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  #include <linux/rwlock_types.h>
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  #endif /* __LINUX_SPINLOCK_TYPES_H */