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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 0AA5AC433DF for ; Fri, 29 May 2020 23:29:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFC43206F1 for ; Fri, 29 May 2020 23:29:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728537AbgE2X3V (ORCPT ); Fri, 29 May 2020 19:29:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728040AbgE2X3U (ORCPT ); Fri, 29 May 2020 19:29:20 -0400 Received: from shards.monkeyblade.net (shards.monkeyblade.net [IPv6:2620:137:e000::1:9]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A445DC03E969; Fri, 29 May 2020 16:29:20 -0700 (PDT) Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id C393312863400; Fri, 29 May 2020 16:29:19 -0700 (PDT) Date: Fri, 29 May 2020 16:29:17 -0700 (PDT) Message-Id: <20200529.162917.1970892823680223252.davem@davemloft.net> To: peterz@infradead.org Cc: mingo@kernel.org, will@kernel.org, tglx@linutronix.de, x86@kernel.org, linux-kernel@vger.kernel.org, a.darwish@linutronix.de, rostedt@goodmis.org, bigeasy@linutronix.de, sparclinux@vger.kernel.org, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, heiko.carstens@de.ibm.com, linux-s390@vger.kernel.org Subject: Re: [RFC][PATCH v3 1/5] sparc64: Fix asm/percpu.h build error From: David Miller In-Reply-To: <20200529214203.673108357@infradead.org> References: <20200529213550.683440625@infradead.org> <20200529214203.673108357@infradead.org> X-Mailer: Mew version 6.8 on Emacs 26.3 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Fri, 29 May 2020 16:29:20 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peter Zijlstra Date: Fri, 29 May 2020 23:35:51 +0200 > ../arch/sparc/include/asm/percpu_64.h:7:24: warning: call-clobbered register used for global register variable > register unsigned long __local_per_cpu_offset asm("g5"); The "-ffixed-g5" option on the command line tells gcc that we are using 'g5' as a fixed register, so some part of your build isn't using the: KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare from arch/sparc/Makefile for some reason. From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Date: Fri, 29 May 2020 23:29:17 +0000 Subject: Re: [RFC][PATCH v3 1/5] sparc64: Fix asm/percpu.h build error Message-Id: <20200529.162917.1970892823680223252.davem@davemloft.net> List-Id: References: <20200529213550.683440625@infradead.org> <20200529214203.673108357@infradead.org> In-Reply-To: <20200529214203.673108357@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: peterz@infradead.org Cc: mingo@kernel.org, will@kernel.org, tglx@linutronix.de, x86@kernel.org, linux-kernel@vger.kernel.org, a.darwish@linutronix.de, rostedt@goodmis.org, bigeasy@linutronix.de, sparclinux@vger.kernel.org, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, heiko.carstens@de.ibm.com, linux-s390@vger.kernel.org From: Peter Zijlstra Date: Fri, 29 May 2020 23:35:51 +0200 > ../arch/sparc/include/asm/percpu_64.h:7:24: warning: call-clobbered register used for global register variable > register unsigned long __local_per_cpu_offset asm("g5"); The "-ffixed-g5" option on the command line tells gcc that we are using 'g5' as a fixed register, so some part of your build isn't using the: KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare from arch/sparc/Makefile for some reason. 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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 55CEAC433E0 for ; Fri, 29 May 2020 23:31:38 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 C42DC2073B for ; Fri, 29 May 2020 23:31:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C42DC2073B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 49YgnM3SkZzDqnp for ; Sat, 30 May 2020 09:31:35 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=davemloft.net (client-ip=2620:137:e000::1:9; helo=shards.monkeyblade.net; envelope-from=davem@davemloft.net; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=davemloft.net Received: from shards.monkeyblade.net (shards.monkeyblade.net [IPv6:2620:137:e000::1:9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 49Ygl151bxzDqY4 for ; Sat, 30 May 2020 09:29:29 +1000 (AEST) Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id C393312863400; Fri, 29 May 2020 16:29:19 -0700 (PDT) Date: Fri, 29 May 2020 16:29:17 -0700 (PDT) Message-Id: <20200529.162917.1970892823680223252.davem@davemloft.net> To: peterz@infradead.org Subject: Re: [RFC][PATCH v3 1/5] sparc64: Fix asm/percpu.h build error From: David Miller In-Reply-To: <20200529214203.673108357@infradead.org> References: <20200529213550.683440625@infradead.org> <20200529214203.673108357@infradead.org> X-Mailer: Mew version 6.8 on Emacs 26.3 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Fri, 29 May 2020 16:29:20 -0700 (PDT) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, bigeasy@linutronix.de, x86@kernel.org, heiko.carstens@de.ibm.com, linux-kernel@vger.kernel.org, rostedt@goodmis.org, a.darwish@linutronix.de, sparclinux@vger.kernel.org, tglx@linutronix.de, will@kernel.org, mingo@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Peter Zijlstra Date: Fri, 29 May 2020 23:35:51 +0200 > ../arch/sparc/include/asm/percpu_64.h:7:24: warning: call-clobbered register used for global register variable > register unsigned long __local_per_cpu_offset asm("g5"); The "-ffixed-g5" option on the command line tells gcc that we are using 'g5' as a fixed register, so some part of your build isn't using the: KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare from arch/sparc/Makefile for some reason.