From 4671c79408a3f8a5a6a45e39c4c164dada3a5678 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 8 May 2009 16:27:41 -0400 Subject: [PATCH] tracing: add trace_set_clr_event to export event enabling function Other parts of the kernel may need to be able to enable or disable specific events. Especially parts that create trace events. [ Impact: allow enabling of trace events by those that create the event ] Signed-off-by: Steven Rostedt --- include/linux/ftrace_event.h | 2 ++ kernel/trace/trace_events.c | 17 +++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 662c1becf367..bae51ddfabd3 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -127,6 +127,8 @@ extern int trace_define_field(struct ftrace_event_call *call, char *type, #define is_signed_type(type) (((type)(-1)) < 0) +int trace_set_clr_event(const char *system, const char *event, int set); + /* * The double __builtin_constant_p is because gcc will give us an error * if we try to allocate the static variable to fmt if it is not a diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 2eecb87e42d3..0eec0c55dd87 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -177,6 +177,23 @@ static int ftrace_set_clr_event(char *buf, int set) return __ftrace_set_clr_event(match, sub, event, set); } +/** + * trace_set_clr_event - enable or disable an event + * @system: system name to match (NULL for any system) + * @event: event name to match (NULL for all events, within system) + * @set: 1 to enable, 0 to disable + * + * This is a way for other parts of the kernel to enable or disable + * event recording. + * + * Returns 0 on success, -EINVAL if the parameters do not match any + * registered events. + */ +int trace_set_clr_event(const char *system, const char *event, int set) +{ + return __ftrace_set_clr_event(NULL, system, event, set); +} + /* 128 should be much more than enough */ #define EVENT_BUF_SIZE 127 -- 2.30.2