Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

tracing: add trace_set_clr_event to export event enabling function

Browse source 
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 <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2009-05-08 16:27:41 -04:00 committed by Steven Rostedt
parent 29f93943d1
commit 4671c79408
2 changed files with 19 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/linux/ftrace_event.h
View file

@ -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

17
kernel/trace/trace_events.c
View file

@ -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