projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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; | |
| 26 | ||
| 27 | /* | |
| 28 | * The locking-testsuite uses <debug_locks_silent> to get a | |
| 29 | * 'silent failure': nothing is printed to the console when | |
| 30 | * a locking bug is detected. | |
| 31 | */ | |
| 32 | int debug_locks_silent; | |
| 33 | ||
| 34 | /* | |
| 35 | * Generic 'turn off all lock debugging' function: | |
| 36 | */ | |
| 37 | int debug_locks_off(void) | |
| 38 | { | |
| 9eeba613 | 39 | if (__debug_locks_off()) { |
| 9a11b49a | 40 | if (!debug_locks_silent) { |
| e0fdace1 | 41 | oops_in_progress = 1; |
| 9a11b49a IM |
42 | console_verbose(); |
| 43 | return 1; | |
| 44 | } | |
| 45 | } | |
| 46 | return 0; | |
| 47 | } |