From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752507AbcDZPSa (ORCPT ); Tue, 26 Apr 2016 11:18:30 -0400 Received: from ozlabs.org ([103.22.144.67]:34925 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752370AbcDZPS2 (ORCPT ); Tue, 26 Apr 2016 11:18:28 -0400 Date: Wed, 27 Apr 2016 01:18:25 +1000 From: Stephen Rothwell To: Nicolas Pitre Cc: Michal Marek , linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, Jens Axboe , Randy Dunlap Subject: Re: linux-next: build failure after merge of the block tree Message-ID: <20160427011825.06c64502@canb.auug.org.au> In-Reply-To: References: <20160426133812.366dc031@canb.auug.org.au> <571F6D59.8040402@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Nicolas, On Tue, 26 Apr 2016 10:40:57 -0400 (EDT) Nicolas Pitre wrote: > > If you can reproduce this build failure, could you try a make mrproper > and attempt it again? I, too, would like to find an explanation and a > way to reproduce. I reset my build tree to commit 9d67df654092 ("Merge remote-tracking branch 'block/for-next'") and the build failed with: ERROR: ".local_clock" [drivers/vhost/vhost_net.ko] undefined! ERROR: ".local_clock" [drivers/misc/cxl/cxl.ko] undefined! :-( So I did a "make mrproper" and did the build again. That built correctly. Then I reset the tree to commit b087ce990625 ("Merge remote-tracking branch 'input/next'"), did a "make mrproper", "make ppc64_defconfig", "make" and that built correctly. So I fast forwarded back to the block tree merge and did "make ppc64_defconfig" and "make" and that failed with: ERROR: ".blk_queue_write_cache" [drivers/block/virtio_blk.ko] undefined! ERROR: ".blk_queue_write_cache" [drivers/block/ps3disk.ko] undefined! ERROR: ".blk_queue_write_cache" [drivers/block/nbd.ko] undefined! Doing the revert made it build, then doing "reset --hard HEAD^" (i.e. undoing the revert) also kept the build working. These builds all have a separate object directory and are powerpc64le hosted powerpc64be cross builds and use "make -j80". -- Cheers, Stephen Rothwell