a975de1ff59feaba6758afa9682ca9203bfc2c42
[linux-3.10.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 <linux/atomic.h>
6 #include <linux/bug.h>
7
8 struct task_struct;
9
10 extern int debug_locks;
11 extern int debug_locks_silent;
12
13
14 static 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  */
22 extern 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_ON(1);                                     \
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
48 struct task_struct;
49
50 #ifdef CONFIG_LOCKDEP
51 extern void debug_show_all_locks(void);
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(void);
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
65 debug_check_no_locks_freed(const void *from, unsigned long len)
66 {
67 }
68
69 static inline void
70 debug_check_no_locks_held(void)
71 {
72 }
73 #endif
74
75 #endif