Linux kernel mirror (for testing)
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linux
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() && !debug_locks_silent) \
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
46struct task_struct;
47
48#ifdef CONFIG_LOCKDEP
49extern void debug_show_all_locks(void);
50extern void __debug_show_held_locks(struct task_struct *task);
51extern void debug_show_held_locks(struct task_struct *task);
52extern void debug_check_no_locks_freed(const void *from, unsigned long len);
53extern void debug_check_no_locks_held(struct task_struct *task);
54#else
55static inline void debug_show_all_locks(void)
56{
57}
58
59static inline void __debug_show_held_locks(struct task_struct *task)
60{
61}
62
63static inline void debug_show_held_locks(struct task_struct *task)
64{
65}
66
67static inline void
68debug_check_no_locks_freed(const void *from, unsigned long len)
69{
70}
71
72static inline void
73debug_check_no_locks_held(struct task_struct *task)
74{
75}
76#endif
77
78#endif