Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753807AbaLANzw (ORCPT ); Mon, 1 Dec 2014 08:55:52 -0500 Received: from cantor2.suse.de ([195.135.220.15]:41492 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753614AbaLANzv (ORCPT ); Mon, 1 Dec 2014 08:55:51 -0500 Message-ID: <547C7364.8000009@suse.cz> Date: Mon, 01 Dec 2014 14:55:48 +0100 From: Michal Marek User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Linus Walleij , Russell King - ARM Linux CC: Jason Cooper , Grant Likely , Rob Herring , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH] ARM: kbuild: Fix forced rebuild after 'make dtbs' References: <1414961549-31666-1-git-send-email-jason@lakedaemon.net> <5474F78F.2060906@suse.cz> <20141125235150.GH3836@n2100.arm.linux.org.uk> <20141126005710.GE22670@titan.lakedaemon.net> <20141126144153.GK3836@n2100.arm.linux.org.uk> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2014-11-28 15:10, Linus Walleij wrote: > On Wed, Nov 26, 2014 at 3:41 PM, Russell King - ARM Linux > wrote: >> On Wed, Nov 26, 2014 at 02:57:42PM +0100, Linus Walleij wrote: >>> make -f Makefile -j5 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- >>> KBUILD_OUTPUT=build-u300 u300_defconfig >>> make -f Makefile -j5 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- >>> KBUILD_OUTPUT=build-u300 zImage CONFIG_DEBUG_SECTION_MISMATCH=y >>> make -f Makefile -j5 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- >>> KBUILD_OUTPUT=build-u300 dtbs >>> make -f Makefile -j5 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- >>> KBUILD_OUTPUT=build-u300 zImage CONFIG_DEBUG_SECTION_MISMATCH=y >>> >>> -> Rebuilds everything. >>> >>> This doesn't occur before the offending commit. So it only happens >>> when specifying extra environment variables on the command line. >> >> I suspect if you also provide the CONFIG_DEBUG_SECTION_MISMATCH=y on the >> dtbs line, everything will work properly. > > Yay, it works! :) > >> The problem is that dtbs line executes a prepare, which I guess rebuilds >> the bounds stuff. So, the dtbs target results in it being rebuilt without >> the section mismatch, and then you re-execute a make with it, causing >> the bounds stuff to be rebuilt again. > > Yep. Not very intuitive to require passing section mismatch debug > flags to DTB rebuilding but whatever, it's not so bad I can't live with > it. Still, the dependency on the 'prepare' target is superfluous, if the only requirement is that $(KERNELRELEASE) be set properly. Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/