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=-5.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 D5EACC433E0 for ; Mon, 1 Feb 2021 20:17:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9258264EBF for ; Mon, 1 Feb 2021 20:17:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231603AbhBAUR2 (ORCPT ); Mon, 1 Feb 2021 15:17:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230479AbhBAURR (ORCPT ); Mon, 1 Feb 2021 15:17:17 -0500 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2827C0613ED for ; Mon, 1 Feb 2021 12:16:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=aK3vS4XWIKg20GCInUmdQbVB0NkYn+deg1AmYhOATD0=; b=SpI98f+GjEpUcBlyJ/DkBEn+d vMBGh5oOToZ9Xe3jZpLU3KhP4wb8IEQ5oxu5vJ8e42Lv8+Pq0SNMqquGrxq738oD2MOI7BpUL0b+m bSowVtKDULiEWA5pxlG/jGyqHfG/z6NHGjetI72OKtim6+MmFIOJNFReUbLKOgTFDynXxAh9P7Nb0 n6sd5qRmjafqF/xAfiR/3SPtuFlvlIxjNlsamBJ1PBAc1zJgQa13IBrpPZZ1Seg3d3kioPsMa2Acq kwQPO9t/8GjVDUR2Ei2KEHwduNZ9pFtFYz+Sb74RQP4KJaNokNuKifYvJAV6MzEcvx94ILgAgZGRg qKuwz35TA==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:37918) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l6fcg-0003i5-Pj; Mon, 01 Feb 2021 20:16:34 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1l6fcf-0002JA-K4; Mon, 01 Feb 2021 20:16:33 +0000 Date: Mon, 1 Feb 2021 20:16:33 +0000 From: Russell King - ARM Linux admin To: Giancarlo Ferrari Cc: Mark Rutland , linux-kernel@vger.kernel.org, penberg@kernel.org, geert@linux-m68k.org, linux-arm-kernel@lists.infradead.org, akpm@linux-foundation.org, rppt@kernel.org, giancarlo.ferrari@nokia.com Subject: Re: [PATCH] ARM: kexec: Fix panic after TLB are invalidated Message-ID: <20210201201633.GJ1463@shell.armlinux.org.uk> References: <1612140296-12546-1-git-send-email-giancarlo.ferrari89@gmail.com> <20210201124720.GA66060@C02TD0UTHF1T.local> <20210201130344.GF1463@shell.armlinux.org.uk> <20210201135714.GB66060@C02TD0UTHF1T.local> <20210201160838.GH1463@shell.armlinux.org.uk> <20210201200734.GC15399@p4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210201200734.GC15399@p4> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: Russell King - ARM Linux admin Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 01, 2021 at 08:07:37PM +0000, Giancarlo Ferrari wrote: > Hi, Hi, > Why we should align 3 ? For the fncpy I suppose. Slightly arbitary really - it gives a nice 8-byte alignment to the data. .align 2 would also be sufficient. > I don't know now how to proceed now, as you (Mark and you) do completely > the patch. Please can you test my patch and let us know if it solves your problem (or even if it works! I haven't tested it beyond build-testing.) > You see is my first kernel patch submission :) . Yay. Sorry for giving you a different patch - Mark is quite right that there's a better solution to this problem, which is eliminating the set_kernel_text_rw() call. The only reason I cooked up the patch was doing that would be more in-depth (as you can see from the increased size of the patch.) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! 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=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 A3B65C433E0 for ; Mon, 1 Feb 2021 20:17:58 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4CA8464EBD for ; Mon, 1 Feb 2021 20:17:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CA8464EBD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: mail.kernel.org; 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Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:37918) by pandora.armlinux.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1l6fcg-0003i5-Pj; Mon, 01 Feb 2021 20:16:34 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1l6fcf-0002JA-K4; Mon, 01 Feb 2021 20:16:33 +0000 Date: Mon, 1 Feb 2021 20:16:33 +0000 From: Russell King - ARM Linux admin To: Giancarlo Ferrari Subject: Re: [PATCH] ARM: kexec: Fix panic after TLB are invalidated Message-ID: <20210201201633.GJ1463@shell.armlinux.org.uk> References: <1612140296-12546-1-git-send-email-giancarlo.ferrari89@gmail.com> <20210201124720.GA66060@C02TD0UTHF1T.local> <20210201130344.GF1463@shell.armlinux.org.uk> <20210201135714.GB66060@C02TD0UTHF1T.local> <20210201160838.GH1463@shell.armlinux.org.uk> <20210201200734.GC15399@p4> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210201200734.GC15399@p4> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210201_151640_454805_8899F2FE X-CRM114-Status: GOOD ( 13.08 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , linux-kernel@vger.kernel.org, penberg@kernel.org, geert@linux-m68k.org, rppt@kernel.org, akpm@linux-foundation.org, linux-arm-kernel@lists.infradead.org, giancarlo.ferrari@nokia.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 01, 2021 at 08:07:37PM +0000, Giancarlo Ferrari wrote: > Hi, Hi, > Why we should align 3 ? For the fncpy I suppose. Slightly arbitary really - it gives a nice 8-byte alignment to the data. .align 2 would also be sufficient. > I don't know now how to proceed now, as you (Mark and you) do completely > the patch. Please can you test my patch and let us know if it solves your problem (or even if it works! I haven't tested it beyond build-testing.) > You see is my first kernel patch submission :) . Yay. Sorry for giving you a different patch - Mark is quite right that there's a better solution to this problem, which is eliminating the set_kernel_text_rw() call. The only reason I cooked up the patch was doing that would be more in-depth (as you can see from the increased size of the patch.) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel