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=-14.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EE349C433E0 for ; Thu, 18 Mar 2021 11:25:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB17B64F2B for ; Thu, 18 Mar 2021 11:25:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229931AbhCRLYu (ORCPT ); Thu, 18 Mar 2021 07:24:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229914AbhCRLYU (ORCPT ); Thu, 18 Mar 2021 07:24:20 -0400 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 798F4C06174A; Thu, 18 Mar 2021 04:24:19 -0700 (PDT) Received: by mail-wm1-x334.google.com with SMTP id m20-20020a7bcb940000b029010cab7e5a9fso5169619wmi.3; Thu, 18 Mar 2021 04:24:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=7qJv0lmltyhc5pLle5TGq0wHOrg4Xv+8MBOabo0U+fQ=; b=cbdK40LKe8CsIG8ZwTUMcukZVEkgnIWdPSsm7+P0bECdTtthwoS9fuXpZkR4Z7rRgQ Pb5Nb43hNMfp57cYd0Us0hOm12SOtZyFyn0b3sKReFBkC7VAyr3Cek1O/IGnrOI+BVt4 qD7yRQUkDjlh0IAFKGvpPnYugURNC6t8xElERQvEKCViTZniQGgac8GO5wrxtO+M2FeW ifeGr7eiFWbavrxBrTdzvmWl++rxYv86oS1YsHvu3kSdlssvawBM+C053+24xBiEzBHk L2NnmLO07DzXz110GZpvgFf+lwx5nm76CuPJr1CpRkOg/hZzQvvG6CIvqHciHdsAl8Uh q5KQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition :content-transfer-encoding:in-reply-to; bh=7qJv0lmltyhc5pLle5TGq0wHOrg4Xv+8MBOabo0U+fQ=; b=WcfqX3ubnUAROImKexgJugNwsfrNuobwIoK96+UELp+tQAh8V5WHQdpSxkzxNlaOSe NVnGR7/Mh0IhieLNDjkiD8/1RC0kJ7LI5LYPTfGzJ/s1WWc3df4Po6wFDvAGpfL8JbyD 9Xf/9tJnK3BUTshOuu7BInn+wME1A2wskogNfF7wh7BicehpSPIIIZvzLiLSKVIqRS0g wJKnKacefJtK+45xl1XI243SWXQob2PHiiNwmFCJPVUX5Cju0Js+CVqRaS0kWLOd6HCe J2EBA2potPhY/h2uyyAmMjge+8BTVibOHVMwQGCmvvAuKbUc0Q3yGPramKttEqDml6Gh HlQQ== X-Gm-Message-State: AOAM533zAoJZVj6wDvtT/FuQXrjXt5Mp8tCS5PNBlOjmBpqSwoOY4/V5 VQvwOg9kYg9zRZWAMEc1ni/UhodLuFk= X-Google-Smtp-Source: ABdhPJz3lLcv0vMupNne2uqgg3lfiSO4Nvz15rmiJ7mwQrBj4JL+DXzW1AhOMwvUJEb5juWUTAZfeA== X-Received: by 2002:a7b:c410:: with SMTP id k16mr3045685wmi.121.1616066658306; Thu, 18 Mar 2021 04:24:18 -0700 (PDT) Received: from gmail.com (54033286.catv.pool.telekom.hu. [84.3.50.134]) by smtp.gmail.com with ESMTPSA id g5sm2666179wrq.30.2021.03.18.04.24.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Mar 2021 04:24:17 -0700 (PDT) Sender: Ingo Molnar Date: Thu, 18 Mar 2021 12:24:15 +0100 From: Ingo Molnar To: Xu Yihang Cc: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH -next] x86: Fix unused variable 'hi' Message-ID: <20210318112415.GA301630@gmail.com> References: <20210318074607.124663-1-xuyihang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20210318074607.124663-1-xuyihang@huawei.com> Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org * Xu Yihang wrote: > Fixes the following W=1 kernel build warning(s): > arch/x86/hyperv/hv_apic.c:58:15: warning: variable ‘hi’ set but not used [-Wunused-but-set-variable] > > Reported-by: Hulk Robot > Signed-off-by: Xu Yihang > --- > arch/x86/hyperv/hv_apic.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c > index 284e73661a18..c0b0a5774f31 100644 > --- a/arch/x86/hyperv/hv_apic.c > +++ b/arch/x86/hyperv/hv_apic.c > @@ -55,7 +55,8 @@ static void hv_apic_icr_write(u32 low, u32 id) > > static u32 hv_apic_read(u32 reg) > { > - u32 reg_val, hi; > + u32 hi __maybe_unused; > + u32 reg_val; > > switch (reg) { > case APIC_EOI: Why and under what config does this function trigger the warning? Thanks, Ingo