diff options
| -rw-r--r-- | kernel/trace/trace_events.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 20ccce3e4ffb..c1e90611fe22 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -2097,16 +2097,20 @@ event_subsystem_dir(struct trace_array *tr, const char *name, dir->subsystem = system; file->system = dir; - entry = tracefs_create_file("filter", 0644, dir->entry, dir, - &ftrace_subsystem_filter_fops); - if (!entry) { - kfree(system->filter); - system->filter = NULL; - pr_warn("Could not create tracefs '%s/filter' entry\n", name); - } + /* the ftrace system is special, do not create enable or filter files */ + if (strcmp(name, "ftrace") != 0) { + + entry = tracefs_create_file("filter", 0644, dir->entry, dir, + &ftrace_subsystem_filter_fops); + if (!entry) { + kfree(system->filter); + system->filter = NULL; + pr_warn("Could not create tracefs '%s/filter' entry\n", name); + } - trace_create_file("enable", 0644, dir->entry, dir, - &ftrace_system_enable_fops); + trace_create_file("enable", 0644, dir->entry, dir, + &ftrace_system_enable_fops); + } list_add(&dir->list, &tr->systems); |