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=-7.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 CBD54ECE58F for ; Tue, 15 Oct 2019 23:29:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9FFC02083B for ; Tue, 15 Oct 2019 23:29:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571182190; bh=FAdZvcnenwhlFxhwcsn2R9+6WGMj9jxQbY94oXTSUl8=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=F7FyVPAZevGaz5frfd2qQOBHyoIsrs0mc/mdMLm+z5J/QmZtQb/7ROgCAk265AwIc bf7x38WV6pxwJmn+I7Gx2Ka2kV6n6QkUsCfZaZ+g0CXU8qv4Sl7e6AbU0F9KTL546H SJP6ZVZPS5pb5fcEBOZPK01TC3jyITdOAeQvxUCM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390281AbfJOX3t (ORCPT ); Tue, 15 Oct 2019 19:29:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:51828 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726142AbfJOX3t (ORCPT ); Tue, 15 Oct 2019 19:29:49 -0400 Received: from mail-wr1-f49.google.com (mail-wr1-f49.google.com [209.85.221.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 83EB92083B for ; Tue, 15 Oct 2019 23:29:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571182188; bh=FAdZvcnenwhlFxhwcsn2R9+6WGMj9jxQbY94oXTSUl8=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=OAa7nYhPqmH3fZS2ep3myJXmazQ+sdWJym29bqapL8IRxxQ0iN1XzUCumYlIDab7X AYp46TKyLq5X7l9/hzuoAioxKiTgOirGce5W10hxOeOxsOMCXkzS7Vb4uWdpmMncor MQmOTdtv5KYCm+jAEVTKCIb1Yj1Dq8jXg/abBA2Q= Received: by mail-wr1-f49.google.com with SMTP id o28so3153288wro.7 for ; Tue, 15 Oct 2019 16:29:48 -0700 (PDT) X-Gm-Message-State: APjAAAVw9dKNq+gH7Gqe9SVdXHii54+ByRrbA2thBmSLOrcBbQyHG2W0 3YFP8P7WVV9hC6PzT5zayMowjmAI/dNiKfJGQf4= X-Google-Smtp-Source: APXvYqxzDItNIN17djf7TakZ7frMDK0m/FesWIBZei0lt/gvBQoA8a0hbOFvn/LcWfEJrFOCAckIwlcW9gxjsu0rQFs= X-Received: by 2002:adf:ebd1:: with SMTP id v17mr29256wrn.204.1571182187025; Tue, 15 Oct 2019 16:29:47 -0700 (PDT) MIME-Version: 1.0 References: <20191015191821.11479-1-bigeasy@linutronix.de> <20191015191821.11479-7-bigeasy@linutronix.de> In-Reply-To: <20191015191821.11479-7-bigeasy@linutronix.de> From: Guo Ren Date: Wed, 16 Oct 2019 07:29:34 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 06/34] csky: Use CONFIG_PREEMPTION To: Sebastian Andrzej Siewior Cc: Linux Kernel Mailing List , tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Could CONFIG_PREEMPT_RT be supported in csky ? Any arch backend porting ? On Wed, Oct 16, 2019 at 3:18 AM Sebastian Andrzej Siewior wrote: > > From: Thomas Gleixner > > CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT. > Both PREEMPT and PREEMPT_RT require the same functionality which today > depends on CONFIG_PREEMPT. > > Switch the entry code over to use CONFIG_PREEMPTION. > > Cc: Guo Ren > Signed-off-by: Thomas Gleixner > Signed-off-by: Sebastian Andrzej Siewior > --- > arch/csky/kernel/entry.S | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S > index a7a5b67df8989..0077063280000 100644 > --- a/arch/csky/kernel/entry.S > +++ b/arch/csky/kernel/entry.S > @@ -277,7 +277,7 @@ ENTRY(csky_irq) > zero_fp > psrset ee > > -#ifdef CONFIG_PREEMPT > +#ifdef CONFIG_PREEMPTION > mov r9, sp /* Get current stack pointer */ > bmaski r10, THREAD_SHIFT > andn r9, r10 /* Get thread_info */ > @@ -294,7 +294,7 @@ ENTRY(csky_irq) > mov a0, sp > jbsr csky_do_IRQ > > -#ifdef CONFIG_PREEMPT > +#ifdef CONFIG_PREEMPTION > subi r12, 1 > stw r12, (r9, TINFO_PREEMPT) > cmpnei r12, 0 > -- > 2.23.0 > -- Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/