From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754594Ab1JMKo0 (ORCPT ); Thu, 13 Oct 2011 06:44:26 -0400 Received: from merlin.infradead.org ([205.233.59.134]:38264 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752377Ab1JMKoZ convert rfc822-to-8bit (ORCPT ); Thu, 13 Oct 2011 06:44:25 -0400 Subject: Re: [PATCH RFC V4 10/10] jump-label: initialize jump-label subsystem much earlier From: Peter Zijlstra To: Jeremy Fitzhardinge Cc: Steven Rostedt , "David S. Miller" , David Daney , Michael Ellerman , Jan Glauber , Jason Baron , the arch/x86 maintainers , Xen Devel , Linux Kernel Mailing List , Ingo Molnar , "H. Peter Anvin" , Jeremy Fitzhardinge Date: Thu, 13 Oct 2011 12:43:48 +0200 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Mailer: Evolution 3.0.3- Message-ID: <1318502628.24856.10.camel@twins> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2011-10-12 at 17:08 -0700, Jeremy Fitzhardinge wrote: > From: Jeremy Fitzhardinge > > Initialize jump_labels much earlier, we can use them. We can use them, where? how? what?, that sentence just begs for more. > diff --git a/init/main.c b/init/main.c > index 2a9b88a..f4094ed 100644 > --- a/init/main.c > +++ b/init/main.c > @@ -637,6 +637,7 @@ asmlinkage void __init start_kernel(void) > acpi_early_init(); /* before LAPIC and SMP init */ > sfi_init_late(); > > + jump_label_init(); > ftrace_init(); > > /* Do the rest non-__init'ed, we're now alive */ Can we push them much earlier still? If possible I'd like them to be before sched_init() so that I might use them there, if not possible, at the very least before enabling interrupts would be nice.