diff options
Diffstat (limited to 'kernel/trace/trace_events.c')
| -rw-r--r-- | kernel/trace/trace_events.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 8d579ff23610..6d2c842a0248 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -932,9 +932,11 @@ static void trace_module_remove_events(struct module *mod) { struct ftrace_module_file_ops *file_ops; struct ftrace_event_call *call, *p; + bool found = false; list_for_each_entry_safe(call, p, &ftrace_events, list) { if (call->mod == mod) { + found = true; if (call->enabled) { call->enabled = 0; call->unregfunc(); @@ -957,6 +959,13 @@ static void trace_module_remove_events(struct module *mod) list_del(&file_ops->list); kfree(file_ops); } + + /* + * It is safest to reset the ring buffer if the module being unloaded + * registered any events. + */ + if (found) + tracing_reset_current_online_cpus(); } static int trace_module_notify(struct notifier_block *self, |