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=-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,URIBL_BLOCKED,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 71A21C433DF for ; Mon, 18 May 2020 17:57:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50DC620715 for ; Mon, 18 May 2020 17:57:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589824654; bh=3rJdlKPl8wLgn6izT/OQntL7glddycl6v36dvt8Vq/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=PX1l5MShwBlrxcusA9lu4qopHg2yv6Mn/ncImdAsEY8aPEejrYUPLzneNSOVnii9X biSpegqp5Dw7g7rre7fyfrIlWgnp/GQF7t61ykkYzXhXyRJU39wRL7hYLdnyKxtfwx rT+df3Jv/S+kPazpICUUH6kuNF/XioLBKSYFM9hw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731804AbgERR5c (ORCPT ); Mon, 18 May 2020 13:57:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:36172 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731803AbgERR5a (ORCPT ); Mon, 18 May 2020 13:57:30 -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 8A10C20715; Mon, 18 May 2020 17:57:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589824650; bh=3rJdlKPl8wLgn6izT/OQntL7glddycl6v36dvt8Vq/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zMN5Ng+mX3TrgWR0hSulH/ubEwpSJCEFsNxOZUZuSd9rll69IdKKKx5XmcSbs8uyb DnaH07HvCpwORoorruiTjpoqm2JvOpDXGwIj9SwY7QczoGTNHEKV/rIcwGKfMJ34Br FvGgcWv8ccSWSeWYVYYdYC/8KFxfFiyZ5DtoCK2A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Linus Torvalds Subject: [PATCH 5.4 096/147] gcc-10: disable zero-length-bounds warning for now Date: Mon, 18 May 2020 19:36:59 +0200 Message-Id: <20200518173525.468110406@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200518173513.009514388@linuxfoundation.org> References: <20200518173513.009514388@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 @@ -856,6 +856,9 @@ KBUILD_CFLAGS += -Wno-pointer-sign # 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)