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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 C1D47C433E2 for ; Fri, 11 Sep 2020 06:21:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 73A71221EB for ; Fri, 11 Sep 2020 06:21:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725763AbgIKGVi (ORCPT ); Fri, 11 Sep 2020 02:21:38 -0400 Received: from verein.lst.de ([213.95.11.211]:35626 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725468AbgIKGVh (ORCPT ); Fri, 11 Sep 2020 02:21:37 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id E676E67373; Fri, 11 Sep 2020 08:21:34 +0200 (CEST) Date: Fri, 11 Sep 2020 08:21:34 +0200 From: Christoph Hellwig To: Harald Freudenberger Cc: linux390-list@tuxmaker.boeblingen.de.ibm.com, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, hca@linux.ibm.com, gor@linux.ibm.com, hch@lst.de, borntraeger@de.ibm.com Subject: Re: [PATCH] s390/zcrypt: remove set_fs() invocation in zcrypt device driver Message-ID: <20200911062134.GB21597@lst.de> References: <20200910102838.28887-1-freude@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200910102838.28887-1-freude@linux.ibm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 10, 2020 at 12:28:38PM +0200, Harald Freudenberger wrote: > +static inline unsigned long z_copy_from_user(bool userspace, > + void *to, const void __user *from, unsigned long n) Can you avoid the pointless long lines in the function declaration? > +{ > + if (likely(userspace)) > + return copy_from_user(to, from, n); > + memcpy(to, (void __force *) from, n); > + return 0; > +} > + > +static inline unsigned long z_copy_to_user(bool userspace, > + void __user *to, const void *from, unsigned long n) > +{ > + if (likely(userspace)) > + return copy_to_user(to, from, n); > + memcpy((void __force *) to, from, n); > + return 0; Otherwise this doesn't look great, but also not horrible and gets rid of the set_fs while reducing the lines of code, so: Reviewed-by: Christoph Hellwig