1#ifndef __LINUX_DEBUG_LOCKING_H
2#define __LINUX_DEBUG_LOCKING_H
3
4struct task_struct;
5
6extern int debug_locks;
7extern int debug_locks_silent;
8
9/*
10 * Generic 'turn off all lock debugging' function:
11 */
12extern int debug_locks_off(void);
13
14/*
15 * In the debug case we carry the caller's instruction pointer into
16 * other functions, but we dont want the function argument overhead
17 * in the nondebug case - hence these macros:
18 */
19#define _RET_IP_		(unsigned long)__builtin_return_address(0)
20#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })
21
22#define DEBUG_LOCKS_WARN_ON(c)						\
23({									\
24	int __ret = 0;							\
25									\
26	if (unlikely(c)) {						\
27		if (debug_locks_off())					\
28			WARN_ON(1);					\
29		__ret = 1;						\
30	}								\
31	__ret;								\
32})
33
34#ifdef CONFIG_SMP
35# define SMP_DEBUG_LOCKS_WARN_ON(c)			DEBUG_LOCKS_WARN_ON(c)
36#else
37# define SMP_DEBUG_LOCKS_WARN_ON(c)			do { } while (0)
38#endif
39
40#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
41  extern void locking_selftest(void);
42#else
43# define locking_selftest()	do { } while (0)
44#endif
45
46#ifdef CONFIG_LOCKDEP
47extern void debug_show_all_locks(void);
48extern void debug_show_held_locks(struct task_struct *task);
49extern void debug_check_no_locks_freed(const void *from, unsigned long len);
50extern void debug_check_no_locks_held(struct task_struct *task);
51#else
52static inline void debug_show_all_locks(void)
53{
54}
55
56static inline void debug_show_held_locks(struct task_struct *task)
57{
58}
59
60static inline void
61debug_check_no_locks_freed(const void *from, unsigned long len)
62{
63}
64
65static inline void
66debug_check_no_locks_held(struct task_struct *task)
67{
68}
69#endif
70
71#endif
72