From patchwork Mon May 18 17:36:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 225865 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 42370C433E0 for ; Mon, 18 May 2020 17:41:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 22593207C4 for ; Mon, 18 May 2020 17:41:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589823717; bh=3kUzS88wbvWSNANmKPvDyZcpEetAwjUqPcFkjDQLwo4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=w3ls9Rit1CMOCR/JP0lqlnYHK91//q7m64Kx1g2kQ+OqeCIm1DuHufcn09daepn3G WVzkAKJBFc8zKP8G5q4yDPgb3hgUo3y8mv5IY+mH2CM0c8ThUJgtTYnrjjS6nlvMSe UdTyJH7AkMNeFKFmhkVb+gt/NqSpeD6E42ZYbCEU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728729AbgERRlz (ORCPT ); Mon, 18 May 2020 13:41:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:38582 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729350AbgERRlz (ORCPT ); Mon, 18 May 2020 13:41:55 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3A2E120715; Mon, 18 May 2020 17:41:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589823714; bh=3kUzS88wbvWSNANmKPvDyZcpEetAwjUqPcFkjDQLwo4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1dCm5AF3n30ggEA/oxov/V68ge7FGFfsni1/+4n50hUCE00nUliI6/d4vCS8xBdok RSeeyiwB6rLN/AXtDvp64yyex/QRk+Ct17WBJuL87Xw2zGUCjby+fTpO/CBLkhE9ot 4XvcS6LVEQ9QnbAU3A+poaaU4MK+hYEW5jmKLQ0s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Linus Torvalds Subject: [PATCH 4.4 59/86] gcc-10: disable zero-length-bounds warning for now Date: Mon, 18 May 2020 19:36:30 +0200 Message-Id: <20200518173502.383357168@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200518173450.254571947@linuxfoundation.org> References: <20200518173450.254571947@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Linus Torvalds commit 5c45de21a2223fe46cf9488c99a7fbcf01527670 upstream. This is a fine warning, but we still have a number of zero-length arrays in the kernel that come from the traditional gcc extension. Yes, they are getting converted to flexible arrays, but in the meantime the gcc-10 warning about zero-length bounds is very verbose, and is hiding other issues. I missed one actual build failure because it was hidden among hundreds of lines of warning. Thankfully I caught it on the second go before pushing things out, but it convinced me that I really need to disable the new warnings for now. We'll hopefully be all done with our conversion to flexible arrays in the not too distant future, and we can then re-enable this warning. Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- Makefile | 3 +++ 1 file changed, 3 insertions(+) --- a/Makefile +++ b/Makefile @@ -795,6 +795,9 @@ KBUILD_CFLAGS += $(call cc-disable-warni # disable stringop warnings in gcc 8+ KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) +# We'll want to enable this eventually, but it's not going away for 5.7 at least +KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) + # Enabled with W=2, disabled by default as noisy KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)