From 5f893b2639b21ffe6834b1aebba392c37d2b83f9 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Fri, 12 Dec 2014 20:05:10 -0500 Subject: tracing: Move enabling tracepoints to just after rcu_init() Enabling tracepoints at boot up can be very useful. The tracepoint can be initialized right after RCU has been. There's no need to wait for the early_initcall() to be called. That's too late for some things that can use tracepoints for debugging. Move the logic to enable tracepoints out of the initcalls and into init/main.c to right after rcu_init(). This also allows trace_printk() to be used early too. Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1412121539300.16494@nanos Link: http://lkml.kernel.org/r/20141214164104.307127356@goodmis.org Reviewed-by: Paul E. McKenney Suggested-by: Thomas Gleixner Tested-by: Thomas Gleixner Acked-by: Thomas Gleixner Signed-off-by: Steven Rostedt --- init/main.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'init/main.c') diff --git a/init/main.c b/init/main.c index 800a0daede7e..70687069f8e2 100644 --- a/init/main.c +++ b/init/main.c @@ -577,6 +577,10 @@ asmlinkage __visible void __init start_kernel(void) local_irq_disable(); idr_init_cache(); rcu_init(); + + /* trace_printk() and trace points may be used after this */ + trace_init(); + context_tracking_init(); radix_tree_init(); /* init some links before init_ISA_irqs() */ -- cgit v1.2.3