doc: clarify that trace_events= takes a comma-separated list

It took me browsing through the source code to determine that I was,
indeed, using the wrong delimiter in my command lines. So I might as
well document it for the next person.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 82b42c958d1c7def4eac5c9931a0e8a6f9aab6c6..a2a662d4da8373e1061950209e1fc9ddf687ecce 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3992,8 +3992,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        trace_event=[event-list]
                        [FTRACE] Set and start specified trace events in order
-                       to facilitate early boot debugging.
-                       See also Documentation/trace/events.txt
+                       to facilitate early boot debugging. The event-list is a
+                       comma separated list of trace events to enable. See
+                       also Documentation/trace/events.txt
 
        trace_options=[option-list]
                        [FTRACE] Enable or disable tracer options at boot.