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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 85DC2C433E1 for ; Thu, 14 May 2020 19:09:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60528206A5 for ; Thu, 14 May 2020 19:09:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589483352; bh=/C65hnEiwYe9KGO4MU6rB65M7/tqg1Zpr8GDvRwFo+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rj1ZWVuvez4N2M979LyL+FLkmm0PX4ox5FocTAxNEkuRXBqJG96jK35NbBwtjUPku 81o5qp1BlDasZkKcbxO7TTqceXDmEYk9x6iIj61NwCVUmdqNd7orenSPKQVQOEc0On yuydC/s9wvZ+wuWaIYq44XibtlpeeR4Ya61fJ148= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728529AbgENSw7 (ORCPT ); Thu, 14 May 2020 14:52:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:51828 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728519AbgENSw7 (ORCPT ); Thu, 14 May 2020 14:52:59 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EFCAF207C3; Thu, 14 May 2020 18:52:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589482378; bh=/C65hnEiwYe9KGO4MU6rB65M7/tqg1Zpr8GDvRwFo+g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lQ4ZcYt8BLFDaUbhqSWQArzJNJyf61AU1KrU38rXMxboIpUdqWge4kPpN4IBFU8Uc D3lnTW6hsxW2SpqbShEAAaNolZpVzMX7fO/lExpxcyxI9+r3+J47cO41xBpaEpuypu 67H7GyMmEoifWl8AiXacJNo3ujGll/C4dw2mo/B4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Linus Torvalds , Sasha Levin , linux-kbuild@vger.kernel.org Subject: [PATCH AUTOSEL 5.6 55/62] gcc-10: disable 'zero-length-bounds' warning for now Date: Thu, 14 May 2020 14:51:40 -0400 Message-Id: <20200514185147.19716-55-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200514185147.19716-1-sashal@kernel.org> References: <20200514185147.19716-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Linus Torvalds [ Upstream commit 5c45de21a2223fe46cf9488c99a7fbcf01527670 ] 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: Sasha Levin --- Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Makefile b/Makefile index d226ec8bd167f..daef13f382906 100644 --- a/Makefile +++ b/Makefile @@ -858,6 +858,9 @@ 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) -- 2.20.1