trace: let boot trace be chosen by command line
Now that we have a working ftrace=<tracer> function, make the boot
tracer get activated by it. This way we can turn it on or off without
recompiling the kernel, as well as keeping the selftests on. The
selftests are disabled whenever a default tracer starts running.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 2c720c7..40edef4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3167,12 +3167,9 @@
trace_init_cmdlines();
register_tracer(&nop_trace);
+ current_trace = &nop_trace;
#ifdef CONFIG_BOOT_TRACER
register_tracer(&boot_tracer);
- current_trace = &boot_tracer;
- current_trace->init(&global_trace);
-#else
- current_trace = &nop_trace;
#endif
/* All seems OK, enable tracing */
tracing_disabled = 0;