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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 1449FC3A5A6 for ; Tue, 27 Aug 2019 06:19:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4BA5217F5 for ; Tue, 27 Aug 2019 06:19:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566886776; bh=gcxXUgEVmD3tszbvz3/XBtWwmU2RW47+E5iLJXT9x6Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=zGqIMGOKhq0fHV5AkBjpOkIQ9SQjVdl6upCl9dIL8q2erBuokg+4A7ReA62uWTiGi 84MJEgLsLXKhj5TsNquFndcdk/y/bL8SxKDzzjCSM8mEwjC/T4v2n8yqIteH7Wck0h 2rhJARKi5SVU/T7oj0ouLYX2tUM7Dnt/qKifpDrQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727226AbfH0GTg (ORCPT ); Tue, 27 Aug 2019 02:19:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:39406 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726091AbfH0GTf (ORCPT ); Tue, 27 Aug 2019 02:19:35 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DF3DD206BB; Tue, 27 Aug 2019 06:19:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566886775; bh=gcxXUgEVmD3tszbvz3/XBtWwmU2RW47+E5iLJXT9x6Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jR85DFUH7lu3yeWJekLjv4K1HEeClksUtBYq4aFtdESGepJ3YYC5/T7Fc0tNR9NPG x9zoQbynhMYyM8ImlzqKZrrg4lv4Diw0TSTuUQdntzN8PkHfx9nTwVxtox6O/KEwL8 pYxcJBdbgNUYp3pLq+uNPOnrRwvOuQ5eAVIKN7ao= Date: Tue, 27 Aug 2019 08:19:33 +0200 From: Greg Kroah-Hartman To: Alastair D'Silva Cc: alastair@d-silva.org, stable@vger.kernel.org, Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Thomas Gleixner , Allison Randal , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] powerpc: Allow flush_(inval_)dcache_range to work across ranges >4GB Message-ID: <20190827061933.GA29250@kroah.com> References: <20190821001929.4253-1-alastair@au1.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190821001929.4253-1-alastair@au1.ibm.com> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 21, 2019 at 10:19:27AM +1000, Alastair D'Silva wrote: > From: Alastair D'Silva > > The upstream commit: > 22e9c88d486a ("powerpc/64: reuse PPC32 static inline flush_dcache_range()") > has a similar effect, but since it is a rewrite of the assembler to C, is > too invasive for stable. This patch is a minimal fix to address the issue in > assembler. > > This patch applies cleanly to v5.2, v4.19 & v4.14. > > When calling flush_(inval_)dcache_range with a size >4GB, we were masking > off the upper 32 bits, so we would incorrectly flush a range smaller > than intended. > > This patch replaces the 32 bit shifts with 64 bit ones, so that > the full size is accounted for. > > Changelog: > v2 > - Add related upstream commit Now applied, thanks. greg k-h