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=-2.3 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 66F15C432C0 for ; Tue, 19 Nov 2019 22:31:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3A99322449 for ; Tue, 19 Nov 2019 22:31:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727414AbfKSWbu (ORCPT ); Tue, 19 Nov 2019 17:31:50 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:54835 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726196AbfKSWbt (ORCPT ); Tue, 19 Nov 2019 17:31:49 -0500 Received: from p5b06da22.dip0.t-ipconnect.de ([91.6.218.34] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1iXC27-0004Yd-KI; Tue, 19 Nov 2019 23:31:39 +0100 Date: Tue, 19 Nov 2019 23:31:38 +0100 (CET) From: Thomas Gleixner To: Qais Yousef cc: Greg Kroah-Hartman , Catalin Marinas , Will Deacon , Steve Capper , Richard Fontana , James Morse , Mark Rutland , Josh Poimboeuf , Ingo Molnar , "Peter Zijlstra (Intel)" , Nicholas Piggin , Daniel Lezcano , Jiri Kosina , Pavankumar Kondeti , Zhenzhong Duan , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 01/12] arm64: hibernate.c: create a new function to handle cpu_up(sleep_cpu) In-Reply-To: <20191030153837.18107-2-qais.yousef@arm.com> Message-ID: References: <20191030153837.18107-1-qais.yousef@arm.com> <20191030153837.18107-2-qais.yousef@arm.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 30 Oct 2019, Qais Yousef wrote: > > +int hibernation_bringup_sleep_cpu(unsigned int sleep_cpu) That function name is horrible. Aside of that I really have to ask how you end up hibernating on an offline CPU? > +{ > + int ret; > + > + if (!cpu_online(sleep_cpu)) { > + pr_info("Hibernated on a CPU that is offline! Bringing CPU up.\n"); > + ret = cpu_up(sleep_cpu); > + if (ret) { > + pr_err("Failed to bring hibernate-CPU up!\n"); > + return ret; > + } > + } > +} Thanks, tglx