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ftrace: clean up of using ftrace_event_enable_disable()

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Always use ftrace_event_enable_disable() to enable/disable an event
so that we can factorize out the event toggling code.

[ Impact: factorize and cleanup event tracing code ]

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <4A14FDFE.2080402@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Zhaolei 2009-05-25 18:13:59 +08:00 committed by Frederic Weisbecker
parent b11c53e12f
commit 0e907c9939
1 changed files with 14 additions and 30 deletions
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44
kernel/trace/trace_events.c
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@ -76,26 +76,9 @@ static void trace_destroy_fields(struct ftrace_event_call *call)
#endif /* CONFIG_MODULES */
static void ftrace_clear_events(void)
{
struct ftrace_event_call *call;
mutex_lock(&event_mutex);
list_for_each_entry(call, &ftrace_events, list) {
if (call->enabled) {
call->enabled = 0;
tracing_stop_cmdline_record();
call->unregfunc();
}
}
mutex_unlock(&event_mutex);
}
static void ftrace_event_enable_disable(struct ftrace_event_call *call,
int enable)
{
switch (enable) {
case 0:
if (call->enabled) {
@ -114,6 +97,17 @@ static void ftrace_event_enable_disable(struct ftrace_event_call *call,
}
}
static void ftrace_clear_events(void)
{
struct ftrace_event_call *call;
mutex_lock(&event_mutex);
list_for_each_entry(call, &ftrace_events, list) {
ftrace_event_enable_disable(call, 0);
}
mutex_unlock(&event_mutex);
}
/*
* __ftrace_set_clr_event(NULL, NULL, NULL, set) will set/unset all events.
*/
@ -1059,11 +1053,7 @@ static void trace_module_remove_events(struct module *mod)
list_for_each_entry_safe(call, p, &ftrace_events, list) {
if (call->mod == mod) {
found = true;
if (call->enabled) {
call->enabled = 0;
tracing_stop_cmdline_record();
call->unregfunc();
}
ftrace_event_enable_disable(call, 0);
if (call->event)
unregister_ftrace_event(call->event);
debugfs_remove_recursive(call->dir);
@ -1265,15 +1255,9 @@ static __init void event_trace_self_tests(void)
continue;
}
call->enabled = 1;
tracing_start_cmdline_record();
call->regfunc();
ftrace_event_enable_disable(call, 1);
event_test_stuff();
call->unregfunc();
tracing_stop_cmdline_record();
call->enabled = 0;
ftrace_event_enable_disable(call, 0);
pr_cont("OK\n");
}