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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CAEF6C43334 for ; Tue, 14 Jun 2022 11:47:29 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4LMmrc0kPWz3bwg for ; Tue, 14 Jun 2022 21:47:28 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=) Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by lists.ozlabs.org (Postfix) with ESMTP id 4LMmr76cShz301N for ; Tue, 14 Jun 2022 21:47:02 +1000 (AEST) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 25EBhmhF018248; Tue, 14 Jun 2022 06:43:48 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 25EBhlHZ018247; Tue, 14 Jun 2022 06:43:47 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Tue, 14 Jun 2022 06:43:47 -0500 From: Segher Boessenkool To: Michael Ellerman Subject: Re: [PATCH 1/6] powerpc: Add ZERO_GPRS macros for register clears Message-ID: <20220614114347.GX25951@gate.crashing.org> References: <20220601054850.250287-1-rmclure@linux.ibm.com> <20220601160023.GV25951@gate.crashing.org> <88BD925A-D6A8-4983-A573-7D9CEE51CDE7@linux.ibm.com> <20220613184830.GW25951@gate.crashing.org> <875yl3dfy2.fsf@mpe.ellerman.id.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <875yl3dfy2.fsf@mpe.ellerman.id.au> User-Agent: Mutt/1.4.2.3i X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rohan McLure , "linuxppc-dev@lists.ozlabs.org" , "npiggin@gmail.com" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Jun 14, 2022 at 02:31:01PM +1000, Michael Ellerman wrote: > Segher Boessenkool writes: > > On Sat, Jun 11, 2022 at 08:42:27AM +0000, Christophe Leroy wrote: > >> I'd have a preference for using a verb, for instance ZEROISE_REGS or > >> CLEAR_REGS > > > > "Zero" is a verb as well (as well as a noun and an adjective) :-) > > And "clear" is also a verb and an adjective, though helpfully the noun > is "clearing" :D Yeah. I don't like "clear" here because it isn't as clear what it actually will do. The purpose here is to actually makes those registers hold the number zero, it isn't just to make it harmless some way. Which btw is the context in which "zeroisation" is normally used: in crypto and other security stuff. But "zero_regs" can be confusing in other ways, like, if it isn't clear to the reader it is a verb here. > We could use "nullify", that has some existing usage in the kernel, > although I don't really mind, "zeroise" sounds kind of cool :) That is a benefit yes :-) And it won't be confusing what it does. Segher