include/linux/debug_locks.h

   1 #ifndef __LINUX_DEBUG_LOCKING_H
   2 #define __LINUX_DEBUG_LOCKING_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/atomic.h>
   6
   7 struct task_struct;
   8
   9 extern int debug_locks;
  10 extern int debug_locks_silent;
  11
  12
  13 static inline int __debug_locks_off(void)
  14 {
  15         return xchg(&debug_locks, 0);
  16 }
  17
  18 /*
  19  * Generic 'turn off all lock debugging' function:
  20  */
  21 extern int debug_locks_off(void);
  22
  23 #define DEBUG_LOCKS_WARN_ON(c)                                          \
  24 ({                                                                      \
  25         int __ret = 0;                                                  \
  26                                                                         \
  27         if (!oops_in_progress && unlikely(c)) {                         \
  28                 if (debug_locks_off() && !debug_locks_silent)           \
  29                         WARN_ON(1);                                     \
  30                 __ret = 1;                                              \
  31         }                                                               \
  32         __ret;                                                          \
  33 })
  34
  35 #ifdef CONFIG_SMP
  36 # define SMP_DEBUG_LOCKS_WARN_ON(c)                     DEBUG_LOCKS_WARN_ON(c)
  37 #else
  38 # define SMP_DEBUG_LOCKS_WARN_ON(c)                     do { } while (0)
  39 #endif
  40
  41 #ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
  42   extern void locking_selftest(void);
  43 #else
  44 # define locking_selftest()     do { } while (0)
  45 #endif
  46
  47 struct task_struct;
  48
  49 #ifdef CONFIG_LOCKDEP
  50 extern void debug_show_all_locks(void);
  51 extern void debug_show_held_locks(struct task_struct *task);
  52 extern void debug_check_no_locks_freed(const void *from, unsigned long len);
  53 extern void debug_check_no_locks_held(struct task_struct *task);
  54 #else
  55 static inline void debug_show_all_locks(void)
  56 {
  57 }
  58
  59 static inline void debug_show_held_locks(struct task_struct *task)
  60 {
  61 }
  62
  63 static inline void
  64 debug_check_no_locks_freed(const void *from, unsigned long len)
  65 {
  66 }
  67
  68 static inline void
  69 debug_check_no_locks_held(struct task_struct *task)
  70 {
  71 }
  72 #endif
  73
  74 #endif