From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Rothwell Subject: linux-next: build failure after merge of the tip tree Date: Mon, 24 Apr 2017 13:32:55 +1000 Message-ID: <20170424133255.0a75cff1@canb.auug.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from ozlabs.org ([103.22.144.67]:35417 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1164470AbdDXDdE (ORCPT ); Sun, 23 Apr 2017 23:33:04 -0400 Sender: linux-next-owner@vger.kernel.org List-ID: To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Peter Zijlstra Cc: Linux-Next Mailing List , Linux Kernel Mailing List , Steven Rostedt Hi all, After merging the tip tree, today's linux-next build (arm multi_v7_defconfig) failed like this: kernel/tracepoint.c: In function 'tracepoint_remove_func': kernel/tracepoint.c:253:4: error: implicit declaration of function 'static_key_slow_dec_cpuslocked' [-Werror=implicit-function-declaration] static_key_slow_dec_cpuslocked(&tp->key); ^ Caused by commit 24db7a671bd5 ("trace/perf: Cure hotplug lock ordering issues") static_key_slow_dec_cpuslocked() is only defined if HAVE_JUMP_LABEL is set - which is only defined if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL). CONFIG_JUMP_LABEL is not set for this build. I wasn't sure if just adding #define static_key_slow_dec_cpuslocked static_key_slow_dec in the !HAVE_JUMP_LABEL case in include/linux/jump_label.h would be sufficient, so I have reverted that commit for today. -- Cheers, Stephen Rothwell