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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 36F69C43603 for ; Tue, 17 Dec 2019 15:37:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0DDB724676 for ; Tue, 17 Dec 2019 15:37:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576597021; bh=9jZda11QUDAhqz9398m+GSMQFxNT4iopEeMhtjrMgyI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=OQQehUvpZjUzyPGgR1qi7RkEEaZtj2DBxBBt3Wk9/aAIFhKY7p49tgP4y54Z7cX1O 0BvrE7o2E4ylJq80+/v0i2Mf0f+5BDYEVzYGbctIPI2feqMdeofndmuVxTh7jyxoqJ 8Fgg18aKWMdOb3NjlKMI5sanTNXw9JNRazkXSDlo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727895AbfLQPhA (ORCPT ); Tue, 17 Dec 2019 10:37:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:33164 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727786AbfLQPg6 (ORCPT ); Tue, 17 Dec 2019 10:36:58 -0500 Received: from rapoport-lnx (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 10E6D24650; Tue, 17 Dec 2019 15:36:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576597018; bh=9jZda11QUDAhqz9398m+GSMQFxNT4iopEeMhtjrMgyI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NH41AYB9/8GFEVCPKVDhcG2wQUXtFJ1TNKXDwSST/RWAfiHZcrYnqXljgFuylj11X kOvMVkov690wSAdpRfV7l/Ep66t7Q8pyDzEXeJD8cI0ThsIffzs4qT7JbZGbvJU246 j12ugDJcKd4dH2cKnV0TDET6JeFzKy1Rh6FsAQic= Date: Tue, 17 Dec 2019 17:36:52 +0200 From: Mike Rapoport To: Rich Felker Cc: linux-sh@vger.kernel.org, Yoshinori Sato , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport , Mike Rapoport Subject: Re: [PATCH 0/2] sh: get rid of __ARCH_USE_5LEVEL_HACK Message-ID: <20191217153651.GB4094@rapoport-lnx> References: <20191217142150.10392-1-rppt@kernel.org> <20191217151549.GH1666@brightrain.aerifal.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191217151549.GH1666@brightrain.aerifal.cx> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 17, 2019 at 10:15:49AM -0500, Rich Felker wrote: > On Tue, Dec 17, 2019 at 04:21:48PM +0200, Mike Rapoport wrote: > > From: Mike Rapoport > > > > Hi, > > > > These patches update the SuperH page table folding/unfolding to take into > > account the 5th level. > > Is this only for 64-bit/sh5? If so, I'd really like to avoid having > patch churn that nominally keeps it working, since it doesn't; GCC > dropped support a long time ago and it was experimental to begin with, > never appeared in production. Has anyone looked lately at what it > would take to remove it? This is a part of a generic cleanup of page table manipulations and removal of __ARCH_USE_5LEVEL_HACK and the related code from the kernel. So this is not related to a particular sh variant. > Rich -- Sincerely yours, Mike.