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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 51006C433E0 for ; Tue, 23 Mar 2021 02:51:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 211C4619AE for ; Tue, 23 Mar 2021 02:51:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229984AbhCWCvM (ORCPT ); Mon, 22 Mar 2021 22:51:12 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:14426 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229915AbhCWCuc (ORCPT ); Mon, 22 Mar 2021 22:50:32 -0400 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4F4G5y1fLmzkcpC; Tue, 23 Mar 2021 10:48:54 +0800 (CST) Received: from vm-Yoda-Ubuntu1804.huawei.com (10.67.174.59) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.498.0; Tue, 23 Mar 2021 10:50:20 +0800 From: Xu Yihang To: , , , , , , , , CC: , , , Subject: [PATCH -next] x86: Fix unused variable 'hi' Date: Tue, 23 Mar 2021 10:50:13 +0800 Message-ID: <20210323025013.191533-1-xuyihang@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210318074607.124663-1-xuyihang@huawei.com> References: <20210318074607.124663-1-xuyihang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.67.174.59] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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] Compiled with CONFIG_HYPERV enabled: make allmodconfig ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- make W=1 arch/x86/hyperv/hv_apic.o ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu- HV_X64_MSR_EOI stores on bit 31:0 and HV_X64_MSR_TPR stores in bit 7:0, which means higher 32 bits are not really used, therefore potentially cast to void in order to silent this warning. Reported-by: Hulk Robot Signed-off-by: Xu Yihang --- arch/x86/hyperv/hv_apic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c index 284e73661a18..a8b639498033 100644 --- a/arch/x86/hyperv/hv_apic.c +++ b/arch/x86/hyperv/hv_apic.c @@ -60,9 +60,11 @@ static u32 hv_apic_read(u32 reg) switch (reg) { case APIC_EOI: rdmsr(HV_X64_MSR_EOI, reg_val, hi); + (void) hi; return reg_val; case APIC_TASKPRI: rdmsr(HV_X64_MSR_TPR, reg_val, hi); + (void) hi; return reg_val; default: -- 2.17.1