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=-2.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 ED3A0C28CC1 for ; Sat, 1 Jun 2019 07:52:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BD13627181 for ; Sat, 1 Jun 2019 07:52:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="QqGdORxj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726832AbfFAHuq (ORCPT ); Sat, 1 Jun 2019 03:50:46 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:50906 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726246AbfFAHup (ORCPT ); Sat, 1 Jun 2019 03:50:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=nAchHLAOVHdFoPNNnyopipE14yM9+t7QnHg4qct0fhU=; b=QqGdORxj6XlyglD2qdBUbBeIC Hy9buW+DsGPqJvsy3MedAvC0mtPN4yHL26eoAFhkNqNsXptjXmU5b9kH7NGdosN/HhHbcY1Un3x7Y Zi2U2o4Svrck8PnJXs3W2TxGi/SZ6nmSJSaNBkN2hHjRGPitl4T5txr4URQ5p6rEFlj0iDLukMJHe ulVUfwf/ovXUOTsjn7hQ6WoovhDPSy3WgHlCw3R27BWoDOACfrUKCWaewFjdzd043EoSTTT2+7hhY 0scSt6R73eF616n6eG7oIaSrfUKql5GXpxFJdfERUiw+gXjckSCuSy9wVbhVqUtaEDY49jEeylkMu 5Nq5UuaoA==; Received: from 217-76-161-89.static.highway.a1.net ([217.76.161.89] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hWymA-0006ZV-Pz; Sat, 01 Jun 2019 07:50:03 +0000 From: Christoph Hellwig To: Linus Torvalds , Paul Burton , James Hogan , Yoshinori Sato , Rich Felker , "David S. Miller" Cc: Nicholas Piggin , Khalid Aziz , Andrey Konovalov , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linux-mips@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: RFC: switch the remaining architectures to use generic GUP v2 Date: Sat, 1 Jun 2019 09:49:43 +0200 Message-Id: <20190601074959.14036-1-hch@lst.de> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Hi Linus and maintainers, below is a series to switch mips, sh and sparc64 to use the generic GUP code so that we only have one codebase to touch for further improvements to this code. I don't have hardware for any of these architectures, and generally no clue about their page table management, so handle with care. Changes since v1: - fix various issues found by the build bot - cherry pick and use the untagged_addr helper form Andrey - add various refactoring patches to share more code over architectures - move the powerpc hugepd code to mm/gup.c and sync it with the generic hup semantics