Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp3620186pxj; Mon, 21 Jun 2021 02:55:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyt8qcwO0Cm+Ga29sZoj2w0aKDfqqeJQVs6ILhEXi6KyeKDpA2F/KZb6z2A9WXZhU6ukQyK X-Received: by 2002:a05:6402:5109:: with SMTP id m9mr20394764edd.68.1624269339966; Mon, 21 Jun 2021 02:55:39 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1624269339; cv=none; d=google.com; s=arc-20160816; b=CdZF5nDSlLiEUQc8wK3qKyGdHA8SUGTlMBsW2m3Rhsf83bG7doOA6ueWMmDCBOTgsp 3xX28sBM88KZeqeckRw9bdVQTELzsBEL5eQq9R0m1Mvid4A5pma+SzMOUpc82lyMOgQL eK1IrmGYZAOmbcnDEJV6usRvmISn4Jzp1WuHRD/32zsCuNEsJ2dmcYFZbpWuvagsY6wC HD3r+UX4qFrXT9SHQ3hgf2bwyLKlEoU88Wys3rm8qytzx6uPRpcf5LFKgNVo+DRCw8or kxjoMARPN48oe7pyCz6a32x30vnL40q7aIWx4DbdMCmeqDxLTUM7HUq3bJJMJb66mQdg bnAA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date; bh=6Qn2fMiMDRDvs1Vevvtv4KSOj0eHHQV1vl94H7jUldM=; b=tL58cSL1jMUkTiGNQ+pji7FWmYraRzIYeg8oMlAtxp9oWV7/vn5NKqRwKMy/oWeG6f EHtYyCnEuda9z69wPtGoMchQQ4r/zXaJ72gJCT+g8qKZyZ9RBy67iB++baVmsr5ZrxF5 CNjLXCDMOYeLlEEyUzDb58ZKy0X7fGc5pEza5Ni1dHvn/rSPts3jXpwmMTrnpY57v2pH 70U9ui9qeQl3ITBtN7mFIPsoMaoJJKLyLgg+k77fkQu0wVPdkpxEEXmnifbJQtn0c3J7 +XoecN1KPdQumpOlN1d+6/FTSZmvyDdEIA3KpviGknyCQhn+uoY8uA1JzT47mkv4Xiwi rHxA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id 5si9581622ejh.535.2021.06.21.02.55.17; Mon, 21 Jun 2021 02:55:39 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230161AbhFUJ41 (ORCPT + 99 others); Mon, 21 Jun 2021 05:56:27 -0400 Received: from elvis.franken.de ([193.175.24.41]:40946 "EHLO elvis.franken.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229663AbhFUJ4Z (ORCPT ); Mon, 21 Jun 2021 05:56:25 -0400 Received: from uucp (helo=alpha) by elvis.franken.de with local-bsmtp (Exim 3.36 #1) id 1lvGd8-000490-00; Mon, 21 Jun 2021 11:54:10 +0200 Received: by alpha.franken.de (Postfix, from userid 1000) id 7982FC071C; Mon, 21 Jun 2021 11:53:54 +0200 (CEST) Date: Mon, 21 Jun 2021 11:53:54 +0200 From: Thomas Bogendoerfer To: zhouchuangao Cc: Huacai Chen , Aleksandar Markovic , linux-mips@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mips/kvm: Use BUG_ON instead of if condition followed by BUG Message-ID: <20210621095354.GD4425@alpha.franken.de> References: <1619166910-70744-1-git-send-email-zhouchuangao@vivo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1619166910-70744-1-git-send-email-zhouchuangao@vivo.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 23, 2021 at 01:35:09AM -0700, zhouchuangao wrote: > BUG_ON uses unlikely in if(), it can be optimized at compile time. > > Usually, the condition in if() is not satisfied. In my opinion, > this can improve the efficiency of the multi-stage pipeline. > > Signed-off-by: zhouchuangao > --- > arch/mips/kvm/tlb.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]