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=-6.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 48537C4741F for ; Tue, 10 Nov 2020 18:14:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E6C9420797 for ; Tue, 10 Nov 2020 18:14:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="fRewQd0c" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731006AbgKJSOi (ORCPT ); Tue, 10 Nov 2020 13:14:38 -0500 Received: from z5.mailgun.us ([104.130.96.5]:26628 "EHLO z5.mailgun.us" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726467AbgKJSOh (ORCPT ); Tue, 10 Nov 2020 13:14:37 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1605032077; h=Date: Message-Id: Cc: To: References: In-Reply-To: From: Subject: Content-Transfer-Encoding: MIME-Version: Content-Type: Sender; bh=ommY8NbC/6/vCsffz4CKNBy1MT65alpBUD3ahMItC0I=; b=fRewQd0cg4ZMvCug61bJw/0H1EPru89y6uc108/8vTkmV/XM1whpdjySPA28abaHUGTICLPr cGDqiebRhrNWp+fnXbjQLtQeriTpFLXGusLkByJ1dgJ+eC0zmKTczf4EoEwqFHdVnNeve56Z xLpEnCD9Smj+9/wvJdOOYoW4hhw= X-Mailgun-Sending-Ip: 104.130.96.5 X-Mailgun-Sid: WyJiZjI2MiIsICJuZXRkZXZAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n03.prod.us-west-2.postgun.com with SMTP id 5faad867e9dd187f53286145 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 10 Nov 2020 18:13:59 GMT Sender: kvalo=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 143D8C43382; Tue, 10 Nov 2020 18:13:59 +0000 (UTC) Received: from potku.adurom.net (88-114-240-156.elisa-laajakaista.fi [88.114.240.156]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: kvalo) by smtp.codeaurora.org (Postfix) with ESMTPSA id 66C6DC433C6; Tue, 10 Nov 2020 18:13:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 66C6DC433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=kvalo@codeaurora.org Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [PATCH net-next 08/11] ath9k: work around false-positive gcc warning From: Kalle Valo In-Reply-To: <20201026213040.3889546-8-arnd@kernel.org> References: <20201026213040.3889546-8-arnd@kernel.org> To: Arnd Bergmann Cc: QCA ath9k Development , "David S. Miller" , Jakub Kicinski , Arnd Bergmann , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org User-Agent: pwcli/0.1.0-git (https://github.com/kvalo/pwcli/) Python/3.5.2 Message-Id: <20201110181359.143D8C43382@smtp.codeaurora.org> Date: Tue, 10 Nov 2020 18:13:59 +0000 (UTC) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Arnd Bergmann wrote: > gcc-10 shows a false-positive warning with CONFIG_KASAN: > > drivers/net/wireless/ath/ath9k/dynack.c: In function 'ath_dynack_sample_tx_ts': > include/linux/etherdevice.h:290:14: warning: writing 4 bytes into a region of size 0 [-Wstringop-overflow=] > 290 | *(u32 *)dst = *(const u32 *)src; > | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ > > Until gcc is fixed, work around this by using memcpy() in place > of ether_addr_copy(). Hopefully gcc-11 will not have this problem. > > Link: https://godbolt.org/z/sab1MK > Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97490 > Signed-off-by: Arnd Bergmann > [kvalo@codeaurora.org: remove ifdef and add a comment] > Signed-off-by: Kalle Valo Patch applied to ath-next branch of ath.git, thanks. b96fab4e3602 ath9k: work around false-positive gcc warning -- https://patchwork.kernel.org/project/linux-wireless/patch/20201026213040.3889546-8-arnd@kernel.org/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches