diff options
Diffstat (limited to 'kernel/trace/trace_events.c')
| -rw-r--r-- | kernel/trace/trace_events.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 58a61302a733..06d6bc275221 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -1709,6 +1709,20 @@ __trace_add_event_dirs(struct trace_array *tr) } } +/* Remove the event directory structure for a trace directory. */ +static void +__trace_remove_event_dirs(struct trace_array *tr) +{ + struct ftrace_event_file *file, *next; + + list_for_each_entry_safe(file, next, &tr->events, list) { + list_del(&file->list); + debugfs_remove_recursive(file->dir); + remove_subsystem(file->system); + kfree(file); + } +} + static void __add_event_to_tracers(struct ftrace_event_call *call, struct ftrace_module_file_ops *file_ops) @@ -1793,6 +1807,25 @@ int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr) return 0; } +int event_trace_del_tracer(struct trace_array *tr) +{ + /* Disable any running events */ + __ftrace_set_clr_event(tr, NULL, NULL, NULL, 0); + + mutex_lock(&event_mutex); + + down_write(&trace_event_mutex); + __trace_remove_event_dirs(tr); + debugfs_remove_recursive(tr->event_dir); + up_write(&trace_event_mutex); + + tr->event_dir = NULL; + + mutex_unlock(&event_mutex); + + return 0; +} + static __init int event_trace_enable(void) { struct trace_array *tr = top_trace_array(); |