include/linux/debug_locks.h

   1 #ifndef __LINUX_DEBUG_LOCKING_H
   2 #define __LINUX_DEBUG_LOCKING_H
   3
   4 #include <linux/kernel.h>
   5
   6 struct task_struct;
   7
   8 extern int debug_locks;
   9 extern int debug_locks_silent;
  10
  11 /*
  12  * Generic 'turn off all lock debugging' function:
  13  */
  14 extern int debug_locks_off(void);
  15
  16 #define DEBUG_LOCKS_WARN_ON(c)                                          \
  17 ({                                                                      \
  18         int __ret = 0;                                                  \
  19                                                                         \
  20         if (!oops_in_progress && unlikely(c)) {                         \
  21                 if (debug_locks_off() && !debug_locks_silent)           \
  22                         WARN_ON(1);                                     \
  23                 __ret = 1;                                              \
  24         }                                                               \
  25         __ret;                                                          \
  26 })
  27
  28 #ifdef CONFIG_SMP
  29 # define SMP_DEBUG_LOCKS_WARN_ON(c)                     DEBUG_LOCKS_WARN_ON(c)
  30 #else
  31 # define SMP_DEBUG_LOCKS_WARN_ON(c)                     do { } while (0)
  32 #endif
  33
  34 #ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
  35   extern void locking_selftest(void);
  36 #else
  37 # define locking_selftest()     do { } while (0)
  38 #endif
  39
  40 struct task_struct;
  41
  42 #ifdef CONFIG_LOCKDEP
  43 extern void debug_show_all_locks(void);
  44 extern void __debug_show_held_locks(struct task_struct *task);
  45 extern void debug_show_held_locks(struct task_struct *task);
  46 extern void debug_check_no_locks_freed(const void *from, unsigned long len);
  47 extern void debug_check_no_locks_held(struct task_struct *task);
  48 #else
  49 static inline void debug_show_all_locks(void)
  50 {
  51 }
  52
  53 static inline void __debug_show_held_locks(struct task_struct *task)
  54 {
  55 }
  56
  57 static inline void debug_show_held_locks(struct task_struct *task)
  58 {
  59 }
  60
  61 static inline void
  62 debug_check_no_locks_freed(const void *from, unsigned long len)
  63 {
  64 }
  65
  66 static inline void
  67 debug_check_no_locks_held(struct task_struct *task)
  68 {
  69 }
  70 #endif
  71
  72 #endif