Commit | Line | Data |
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9a11b49a IM |
1 | /* |
2 | * lib/debug_locks.c | |
3 | * | |
4 | * Generic place for common debugging facilities for various locks: | |
5 | * spinlocks, rwlocks, mutexes and rwsems. | |
6 | * | |
7 | * Started by Ingo Molnar: | |
8 | * | |
9 | * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> | |
10 | */ | |
e0fdace1 | 11 | #include <linux/kernel.h> |
9a11b49a IM |
12 | #include <linux/rwsem.h> |
13 | #include <linux/mutex.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/spinlock.h> | |
16 | #include <linux/debug_locks.h> | |
17 | ||
18 | /* | |
19 | * We want to turn all lock-debugging facilities on/off at once, | |
20 | * via a global flag. The reason is that once a single bug has been | |
21 | * detected and reported, there might be cascade of followup bugs | |
22 | * that would just muddy the log. So we report the first one and | |
23 | * shut up after that. | |
24 | */ | |
25 | int debug_locks = 1; | |
632ee200 | 26 | EXPORT_SYMBOL_GPL(debug_locks); |
9a11b49a IM |
27 | |
28 | /* | |
29 | * The locking-testsuite uses <debug_locks_silent> to get a | |
30 | * 'silent failure': nothing is printed to the console when | |
31 | * a locking bug is detected. | |
32 | */ | |
33 | int debug_locks_silent; | |
34 | ||
35 | /* | |
36 | * Generic 'turn off all lock debugging' function: | |
37 | */ | |
38 | int debug_locks_off(void) | |
39 | { | |
9eeba613 | 40 | if (__debug_locks_off()) { |
9a11b49a | 41 | if (!debug_locks_silent) { |
e0fdace1 | 42 | oops_in_progress = 1; |
9a11b49a IM |
43 | console_verbose(); |
44 | return 1; | |
45 | } | |
46 | } | |
47 | return 0; | |
48 | } |