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=-3.8 required=3.0 tests=BAYES_00, 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 CD021C433DB for ; Fri, 15 Jan 2021 00:31:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 97F0E23A9D for ; Fri, 15 Jan 2021 00:31:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731307AbhAOAbb (ORCPT ); Thu, 14 Jan 2021 19:31:31 -0500 Received: from smtprelay0014.hostedemail.com ([216.40.44.14]:34532 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1731129AbhAOAba (ORCPT ); Thu, 14 Jan 2021 19:31:30 -0500 Received: from filter.hostedemail.com (clb03-v110.bra.tucows.net [216.40.38.60]) by smtprelay08.hostedemail.com (Postfix) with ESMTP id 136D7182CF665; Fri, 15 Jan 2021 00:30:49 +0000 (UTC) X-Session-Marker: 6A6F6540706572636865732E636F6D X-HE-Tag: grip76_15176d22752b X-Filterd-Recvd-Size: 2538 Received: from [192.168.1.159] (unknown [47.151.137.21]) (Authenticated sender: joe@perches.com) by omf05.hostedemail.com (Postfix) with ESMTPA; Fri, 15 Jan 2021 00:30:46 +0000 (UTC) Message-ID: Subject: Re: [PATCH] compiler.h: Raise minimum version of GCC to 5.1 for arm64 From: Joe Perches To: Linus Torvalds Cc: Ard Biesheuvel , Russell King - ARM Linux admin , Florian Weimer , Arnd Bergmann , "Cc: Android Kernel" , Theodore Ts'o , Peter Zijlstra , Catalin Marinas , Masahiro Yamada , Nick Desaulniers , Linux Kernel Mailing List , Will Deacon , linux-arm-kernel Date: Thu, 14 Jan 2021 16:30:45 -0800 In-Reply-To: References: <20210112224832.10980-1-will@kernel.org> <161055398865.21762.12236232732054213928.b4-ty@arm.com> <20210113214436.GL1551@shell.armlinux.org.uk> Content-Type: text/plain; charset="ISO-8859-1" User-Agent: Evolution 3.38.1-1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2021-01-14 at 13:18 -0800, Linus Torvalds wrote: > On Thu, Jan 14, 2021 at 11:52 AM Joe Perches wrote: > > > > Given the upgrade requirement, and how clang version requirements > > constantly change, how much more difficult would it be for others > > to use gcc 7.1 or higher now instead of later? > > What was the argument for jumping all the way to gcc-7.1? > > I do think we want to have real reasons we can point to, rather than a > "just because". KASAN v5 instead of all the old versions gcc 7.1 supports fallthrough. Probably more, but those might be sufficient. 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=-4.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 66982C433DB for ; Fri, 15 Jan 2021 00:32:23 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 2298E23A9D for ; Fri, 15 Jan 2021 00:32:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2298E23A9D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=perches.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Date:To:From: Subject:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NB4qkv6Xlj1GwRwpvBX4Bqsr04AbY2D/57E7FYLFcIU=; b=yzuBaIrwL1phYPoFXxrq/qSCI ITPGVG3xNxpt1Qb6m0fp/vk9pdCAyQ6oLxFcLV+xBA9P18qFmLrdP0BUl79Yd6DQTr2YtIOkHLfjk hqRCZ8hrDMq+lHxM3veW6wSrCTH6Hf7SHDwwOWh031QOhi4DovH2CDIgQqVyA0JaKQjm4WyBYXzfz VUrgXY1XCbM+v7dxrx2zPDkaBkW3ub4qJygmsFcHKg6fqWpYjdibbKlo367KgbgxYKUFCkHF3GuJW WpZtlt+w/yrc8zNTw6WqYLfSR8LggKvaMg6e7KYnz7gijLxGJbi4kS+qDc1WOvG/Q3R7Eg98Qhror 5HD1T6X/w==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l0D0w-0000y7-O2; Fri, 15 Jan 2021 00:30:54 +0000 Received: from smtprelay0154.hostedemail.com ([216.40.44.154] helo=smtprelay.hostedemail.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l0D0u-0000xm-OH for linux-arm-kernel@lists.infradead.org; Fri, 15 Jan 2021 00:30:53 +0000 Received: from filter.hostedemail.com (clb03-v110.bra.tucows.net [216.40.38.60]) by smtprelay08.hostedemail.com (Postfix) with ESMTP id 136D7182CF665; Fri, 15 Jan 2021 00:30:49 +0000 (UTC) X-Session-Marker: 6A6F6540706572636865732E636F6D X-HE-Tag: grip76_15176d22752b X-Filterd-Recvd-Size: 2538 Received: from [192.168.1.159] (unknown [47.151.137.21]) (Authenticated sender: joe@perches.com) by omf05.hostedemail.com (Postfix) with ESMTPA; Fri, 15 Jan 2021 00:30:46 +0000 (UTC) Message-ID: Subject: Re: [PATCH] compiler.h: Raise minimum version of GCC to 5.1 for arm64 From: Joe Perches To: Linus Torvalds Date: Thu, 14 Jan 2021 16:30:45 -0800 In-Reply-To: References: <20210112224832.10980-1-will@kernel.org> <161055398865.21762.12236232732054213928.b4-ty@arm.com> <20210113214436.GL1551@shell.armlinux.org.uk> User-Agent: Evolution 3.38.1-1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210114_193052_820428_D93CC61B X-CRM114-Status: GOOD ( 13.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Florian Weimer , Arnd Bergmann , Theodore Ts'o , Will Deacon , Peter Zijlstra , Catalin Marinas , Masahiro Yamada , Nick Desaulniers , Russell King - ARM Linux admin , Linux Kernel Mailing List , "Cc: Android Kernel" , Ard Biesheuvel , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 2021-01-14 at 13:18 -0800, Linus Torvalds wrote: > On Thu, Jan 14, 2021 at 11:52 AM Joe Perches wrote: > > > > Given the upgrade requirement, and how clang version requirements > > constantly change, how much more difficult would it be for others > > to use gcc 7.1 or higher now instead of later? > > What was the argument for jumping all the way to gcc-7.1? > > I do think we want to have real reasons we can point to, rather than a > "just because". KASAN v5 instead of all the old versions gcc 7.1 supports fallthrough. Probably more, but those might be sufficient. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel