tracing: Do not show filter file for ftrace internal events (5d948c86) · Commits · 戴 / test

The filter file in the ftrace internal events, like in /sys/kernel/tracing/events/ftrace/function/filter is not attached to any functionality. Do not create them as they are meaningless. In the future, if an ftrace internal event gets filter functionality, then it will need to create it directly. Reviewed-by:

Namhyung Kim <namhyung@kernel.org> Signed-off-by:

Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/trace_events.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -2007,16 +2007,18 @@ event_create_dir(struct dentry parent, struct trace_event_file file)
		return -1;
		}
		}
		trace_create_file("filter", 0644, file->dir, file,
		&ftrace_event_filter_fops);

		/*
		* Only event directories that can be enabled should have
		* triggers.
		* triggers or filters.
		*/
		if (!(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE))
		if (!(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE)) {
		trace_create_file("filter", 0644, file->dir, file,
		&ftrace_event_filter_fops);

		trace_create_file("trigger", 0644, file->dir, file,
		&event_trigger_fops);
		}

		#ifdef CONFIG_HIST_TRIGGERS
		trace_create_file("hist", 0444, file->dir, file,

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