Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262638AbVAPW6m (ORCPT ); Sun, 16 Jan 2005 17:58:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262640AbVAPW6m (ORCPT ); Sun, 16 Jan 2005 17:58:42 -0500 Received: from quark.didntduck.org ([69.55.226.66]:10691 "EHLO quark.didntduck.org") by vger.kernel.org with ESMTP id S262638AbVAPW6j (ORCPT ); Sun, 16 Jan 2005 17:58:39 -0500 Message-ID: <41EAF198.1020501@didntduck.org> Date: Sun, 16 Jan 2005 17:58:32 -0500 From: Brian Gerst User-Agent: Mozilla Thunderbird (X11/20041216) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Michael S. Tsirkin" CC: linux-kernel@vger.kernel.org, kbuild-devel@lists.sourceforge.net, zippel@linux-m68k.org Subject: Re: [PATCH] split UTS_RELEASE to a separate header. References: <20050116152242.GA4537@mellanox.co.il> <20050116161622.GC3090@mars.ravnborg.org> <20050116200046.GB5276@mellanox.co.il> In-Reply-To: <20050116200046.GB5276@mellanox.co.il> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2041 Lines: 56 Michael S. Tsirkin wrote: > Hello! > Quoting r. Sam Ravnborg (sam@ravnborg.org) "Re: changing local version requires full rebuild": > >>On Sun, Jan 16, 2005 at 05:22:42PM +0200, Michael S. Tsirkin wrote: >> >>>Hi! >>>Is it just me, or does changing the local version always require >>>a full kernel rebuild? >>> >>>If so, I'd like to fix it, since I like copying >>>my kernel source with --preserve and changing the >>>local version, then going back to the old version in case of >>>a crash. >>>Its important to change the local version to force >>>make install and make modules_install to put things in a separate >>>directory. >> >>Just tried it out here. >>After cp -Ra only a limited part of the kernel rebuilds. >>o oiu.c in ieee directory - because it dependson the shell script >>o A number of drivers that include version.h >> - This should be changed so local version does not affect >> the reast of version.h. >>o Other stuff that is always build if kernel has changed >> >>Do you use "echo -mylocalver > localversion" to change the local version? >> >> Sam > > > Well, we have > /usr/src/linux-2.6.10-gold # grep -l UTS_RELEASE -rI . | wc -l > 29 > grep -l version.h -rI . | fgrep -v .cmd | fgrep -v '.mod' | fgrep -e '.c' -e '.h' | wc -l > 354 > > This means that about 300 files are compiled each time localversion changes, > which do not actually use the local version. > > So, let us split UTS_RELEASE to a separate header: release.h > The following patch over 2.6.10 does that, and fixed the in-tree files that > really need to include it. > Works for me, and helps me cut down compilation time. Comments? > Most of the stuff using UTS_RELEASE can use system_utsname.release instead (except boot code). Most cases in drivers/ can simply be removed. -- Brian Gerst - 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/