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Diffstat (limited to 'lib/debug_locks.c')
-rw-r--r-- | lib/debug_locks.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/debug_locks.c b/lib/debug_locks.c new file mode 100644 index 00000000..b1c17730 --- /dev/null +++ b/lib/debug_locks.c @@ -0,0 +1,46 @@ +/* + * lib/debug_locks.c + * + * Generic place for common debugging facilities for various locks: + * spinlocks, rwlocks, mutexes and rwsems. + * + * Started by Ingo Molnar: + * + * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> + */ +#include <linux/rwsem.h> +#include <linux/mutex.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/debug_locks.h> + +/* + * We want to turn all lock-debugging facilities on/off at once, + * via a global flag. The reason is that once a single bug has been + * detected and reported, there might be cascade of followup bugs + * that would just muddy the log. So we report the first one and + * shut up after that. + */ +int debug_locks = 1; +EXPORT_SYMBOL_GPL(debug_locks); + +/* + * The locking-testsuite uses <debug_locks_silent> to get a + * 'silent failure': nothing is printed to the console when + * a locking bug is detected. + */ +int debug_locks_silent; + +/* + * Generic 'turn off all lock debugging' function: + */ +int debug_locks_off(void) +{ + if (__debug_locks_off()) { + if (!debug_locks_silent) { + console_verbose(); + return 1; + } + } + return 0; +} |