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kernel/linux-imx6_3.14.28/include/linux/debug_locks.h 1.48 KB
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  #ifndef __LINUX_DEBUG_LOCKING_H
  #define __LINUX_DEBUG_LOCKING_H
  
  #include <linux/kernel.h>
  #include <linux/atomic.h>
  #include <linux/bug.h>
  
  struct task_struct;
  
  extern int debug_locks;
  extern int debug_locks_silent;
  
  
  static inline int __debug_locks_off(void)
  {
  	return xchg(&debug_locks, 0);
  }
  
  /*
   * Generic 'turn off all lock debugging' function:
   */
  extern int debug_locks_off(void);
  
  #define DEBUG_LOCKS_WARN_ON(c)						\
  ({									\
  	int __ret = 0;							\
  									\
  	if (!oops_in_progress && unlikely(c)) {				\
  		if (debug_locks_off() && !debug_locks_silent)		\
  			WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c);		\
  		__ret = 1;						\
  	}								\
  	__ret;								\
  })
  
  #ifdef CONFIG_SMP
  # define SMP_DEBUG_LOCKS_WARN_ON(c)			DEBUG_LOCKS_WARN_ON(c)
  #else
  # define SMP_DEBUG_LOCKS_WARN_ON(c)			do { } while (0)
  #endif
  
  #ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
    extern void locking_selftest(void);
  #else
  # define locking_selftest()	do { } while (0)
  #endif
  
  struct task_struct;
  
  #ifdef CONFIG_LOCKDEP
  extern void debug_show_all_locks(void);
  extern void debug_show_held_locks(struct task_struct *task);
  extern void debug_check_no_locks_freed(const void *from, unsigned long len);
  extern void debug_check_no_locks_held(void);
  #else
  static inline void debug_show_all_locks(void)
  {
  }
  
  static inline void debug_show_held_locks(struct task_struct *task)
  {
  }
  
  static inline void
  debug_check_no_locks_freed(const void *from, unsigned long len)
  {
  }
  
  static inline void
  debug_check_no_locks_held(void)
  {
  }
  #endif
  
  #endif