tracing: Show the tracer options in boot-time created instance

Since tracer_init_tracefs_work_func() only updates the tracer options
for the global_trace, the instances created by the kernel cmdline
do not have those options.

Fix to update tracer options for those boot-time created instances
to show those options.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://patch.msgid.link/176354112555.2356172.3989277078358802353.stgit@mhiramat.tok.corp.google.com
Fixes: 428add559b69 ("tracing: Have tracer option be instance specific")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 59cd4ed8af6dec3b2d16aa020dbcda3ceb0b9a13..032bdedca5d98041f7f388d65342102bc45ac1ad 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -10228,11 +10228,14 @@ static __init int __update_tracer_options(struct trace_array *tr)
        return ret;
 }
 
-static __init void update_tracer_options(struct trace_array *tr)
+static __init void update_tracer_options(void)
 {
+       struct trace_array *tr;
+
        guard(mutex)(&trace_types_lock);
        tracer_options_updated = true;
-       __update_tracer_options(tr);
+       list_for_each_entry(tr, &ftrace_trace_arrays, list)
+               __update_tracer_options(tr);
 }
 
 /* Must have trace_types_lock held */
@@ -10934,7 +10937,7 @@ static __init void tracer_init_tracefs_work_func(struct work_struct *work)
 
        create_trace_instances(NULL);
 
-       update_tracer_options(&global_trace);
+       update_tracer_options();
 }
 
 static __init int tracer_init_tracefs(void)