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