tracing: remove ftrace:function TRACE_EVENT_FL_USE_CALL_FILTER flag

TRACE_EVENT_FL_USE_CALL_FILTER flag in ftrace:functon event can be
removed. This flag was first introduced in commit
f306cc82a93d ("tracing: Update event filters for multibuffer").

Now, the only place uses this flag is ftrace:function, but the filter of
ftrace:function has a different code path with events/syscalls and
events/tracepoints. It uses ftrace_filter_write() and perf's
ftrace_profile_set_filter() to set the filter, the functionality of file
'tracing/events/ftrace/function/filter' is bypassed in function
init_pred(), in which case, neither call->filter nor file->filter is
used.

So we can safely remove TRACE_EVENT_FL_USE_CALL_FILTER flag from
ftrace:function events.

Link: http://lkml.kernel.org/r/1425367294-27852-1-git-send-email-hekuang@huawei.com
Signed-off-by: He Kuang <hekuang@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 12e2b99be862f9350c49e9350c4836b3ced68a52..174a6a71146c8867f6ff3e9414a0c85aaf48c7c5 100644 (file)
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -177,7 +177,7 @@ struct ftrace_event_call __used event_##call = {                    \
        },                                                              \
        .event.type             = etype,                                \
        .print_fmt              = print,                                \
-       .flags                  = TRACE_EVENT_FL_IGNORE_ENABLE | TRACE_EVENT_FL_USE_CALL_FILTER, \
+       .flags                  = TRACE_EVENT_FL_IGNORE_ENABLE,         \
 };                                                                     \
 struct ftrace_event_call __used                                                \
 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;