From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26C7CC43603 for ; Sun, 8 Dec 2019 13:15:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EB8A3206E0 for ; Sun, 8 Dec 2019 13:15:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726425AbfLHNPg (ORCPT ); Sun, 8 Dec 2019 08:15:36 -0500 Received: from mga11.intel.com ([192.55.52.93]:13839 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726236AbfLHNPg (ORCPT ); Sun, 8 Dec 2019 08:15:36 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Dec 2019 05:15:35 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,291,1571727600"; d="scan'208";a="202579954" Received: from cvg-ubt08.iil.intel.com (HELO [143.185.152.138]) ([143.185.152.138]) by orsmga007.jf.intel.com with ESMTP; 08 Dec 2019 05:15:34 -0800 To: linux-rt-users From: Vladimir Kondratiev Subject: How to use PREEMPT_RT with kernel 5.4 Message-ID: <7f488716-f294-a21c-4588-6753ff9bd0df@linux.intel.com> Date: Sun, 8 Dec 2019 15:15:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org Hi, I need to build RT enabled kernel. With kernels up to and including 5.2, there was fairly easy procedure for building RT enabled kernel - apply patch, then RT features are immediately available in "make xxxconfig". Now, with 5.4. CONFIG_PREEMPT_RT is merged, but it depends_on ARCH_SUPPORTS_RT that, in turn, does not set for any architecture. How should I proceed from here? Am I supposed to just set ARCH_SUPPORTS_RT for my architecture? Do I need any other patches to start? If yes, where to get it? I see not all patches in the 5.2 bundle are merged mainline. Thanks, Vladimir