lockdep: warn about lockdep disabling after kernel taint
[linux-2.6.git] / 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 <asm/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_show_held_locks(struct task_struct *task);
53 extern void debug_check_no_locks_freed(const void *from, unsigned long len);
54 extern void debug_check_no_locks_held(struct task_struct *task);
55 #else
56 static inline void debug_show_all_locks(void)
57 {
58 }
59
60 static inline void __debug_show_held_locks(struct task_struct *task)
61 {
62 }
63
64 static inline void debug_show_held_locks(struct task_struct *task)
65 {
66 }
67
68 static inline void
69 debug_check_no_locks_freed(const void *from, unsigned long len)
70 {
71 }
72
73 static inline void
74 debug_check_no_locks_held(struct task_struct *task)
75 {
76 }
77 #endif
78
79 #endif