1#ifndef __LINUX_DEBUG_LOCKING_H
2#define __LINUX_DEBUG_LOCKING_H
3
4#include <linux/kernel.h>
5#include <linux/atomic.h>
6#include <linux/bug.h>
7
8struct task_struct;
9
10extern int debug_locks;
11extern int debug_locks_silent;
12
13
14static inline int __debug_locks_off(void)
15{
16	return xchg(&debug_locks, 0);
17}
18
19/*
20 * Generic 'turn off all lock debugging' function:
21 */
22extern int debug_locks_off(void);
23
24#define DEBUG_LOCKS_WARN_ON(c)						\
25({									\
26	int __ret = 0;							\
27									\
28	if (!oops_in_progress && unlikely(c)) {				\
29		if (debug_locks_off() && !debug_locks_silent)		\
30			WARN(1, "DEBUG_LOCKS_WARN_ON(%s)", #c);		\
31		__ret = 1;						\
32	}								\
33	__ret;								\
34})
35
36#ifdef CONFIG_SMP
37# define SMP_DEBUG_LOCKS_WARN_ON(c)			DEBUG_LOCKS_WARN_ON(c)
38#else
39# define SMP_DEBUG_LOCKS_WARN_ON(c)			do { } while (0)
40#endif
41
42#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
43  extern void locking_selftest(void);
44#else
45# define locking_selftest()	do { } while (0)
46#endif
47
48struct task_struct;
49
50#ifdef CONFIG_LOCKDEP
51extern void debug_show_all_locks(void);
52extern void debug_show_held_locks(struct task_struct *task);
53extern void debug_check_no_locks_freed(const void *from, unsigned long len);
54extern void debug_check_no_locks_held(void);
55#else
56static inline void debug_show_all_locks(void)
57{
58}
59
60static inline void debug_show_held_locks(struct task_struct *task)
61{
62}
63
64static inline void
65debug_check_no_locks_freed(const void *from, unsigned long len)
66{
67}
68
69static inline void
70debug_check_no_locks_held(void)
71{
72}
73#endif
74
75#endif
76