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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 EE91CC433B4 for ; Tue, 20 Apr 2021 03:11:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4E936102A for ; Tue, 20 Apr 2021 03:11:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229566AbhDTDLi (ORCPT ); Mon, 19 Apr 2021 23:11:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229508AbhDTDLh (ORCPT ); Mon, 19 Apr 2021 23:11:37 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88327C06174A; Mon, 19 Apr 2021 20:11:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=AqTuRNKIkAmLe8Av3ztkUAdmYLIeq8PftziUxkdnED4=; b=cmFm54dBhWL/FJIZPa1qLdPQCh Hw3d+6yeN1BRhVLA8lXi0+OxBNGlwLN0iOxnz1tNw19z7dwED70uUHLHZ0QHCfVKNKBQenpL6sjTp RiTDO60rG0H/+Io0sMW2Sl9Yi8uXuQbOmHCm5NzIBmET6uhHQgkerVA9dwlFEY8qLE05GHB/V0PuZ Ao/jqa8j5AAd9wR8FIZ6K7RUe8Zya2Y8SayHTkT8KDCcVbyrGWXzGbXLEMb2IexWdlSkgwpOFyitu JUjQ4dGrsXV5WoOuWngimlVppnjX5FKsAVbm0+zGZtX6LrP+cU2NI9VCFMIOrg0zh0XBFnqcrMJKV Y0NuvgGw==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmT-00Ee86-KY; Tue, 20 Apr 2021 03:10:34 +0000 Date: Tue, 20 Apr 2021 04:10:29 +0100 From: Matthew Wilcox To: Vineet Gupta Cc: "brouer@redhat.com" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "netdev@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mips@vger.kernel.org" , "ilias.apalodimas@linaro.org" , "mcroce@linux.microsoft.com" , "grygorii.strashko@ti.com" , "arnd@kernel.org" , "hch@lst.de" , "linux-snps-arc@lists.infradead.org" , "mhocko@kernel.org" , "mgorman@suse.de" Subject: Re: [PATCH 1/2] mm: Fix struct page layout on 32-bit systems Message-ID: <20210420031029.GI2531743@casper.infradead.org> References: <20210416230724.2519198-1-willy@infradead.org> <20210416230724.2519198-2-willy@infradead.org> <20210417024522.GP2531743@casper.infradead.org> <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On Tue, Apr 20, 2021 at 02:48:17AM +0000, Vineet Gupta wrote: > > 32-bit architectures which expect 8-byte alignment for 8-byte integers > > and need 64-bit DMA addresses (arc, arm, mips, ppc) had their struct > > page inadvertently expanded in 2019. > > FWIW, ARC doesn't require 8 byte alignment for 8 byte integers. This is > only needed for 8-byte atomics due to the requirements of LLOCKD/SCOND > instructions. Ah, like x86? OK, great, I'll drop your arch from the list of affected. Thanks! 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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 D41F1C433B4 for ; Tue, 20 Apr 2021 03:10:57 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 85F836102A for ; Tue, 20 Apr 2021 03:10:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 85F836102A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=eT2vIzpiuPuPVHgFpPCMp8KpoQ2DleViwDnLJMEp1qc=; b=W6k4cJ4/O1NUAZNAoeih2nQqt I00PAk8jwFt2oZnE0DB/Ppu5tpvLTVVXqx/NJ6k5JyRAvpavOw7skdK6JOKBrLCjF2cWdg76aCKJ+ A3YpjfImSXS9bfDF1eBIc6thoa1oWiGBN4bSRvJu60mRksioYZSU7r4zsSDAyhhAxoe5dDFrwAxZx 0ATtaFlGgB8P5lxizbuY20cm1XbLR4AWWC8sYsBRwXwgWTAKvg/CTXJCwxWahhZ+/XvTH6omBLzOP i47LljrvMgrcp08XhqJY2+wr7sKV8R2UF3gz/ZZJqD8nNr9s2BwHut5/3dDzqNxPS2UVBTsoBu2dB 8Zt1mi+Iw==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lYgms-00B2fv-JO; Tue, 20 Apr 2021 03:10:54 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmh-00B2eg-0s; Tue, 20 Apr 2021 03:10:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=AqTuRNKIkAmLe8Av3ztkUAdmYLIeq8PftziUxkdnED4=; b=cmFm54dBhWL/FJIZPa1qLdPQCh Hw3d+6yeN1BRhVLA8lXi0+OxBNGlwLN0iOxnz1tNw19z7dwED70uUHLHZ0QHCfVKNKBQenpL6sjTp RiTDO60rG0H/+Io0sMW2Sl9Yi8uXuQbOmHCm5NzIBmET6uhHQgkerVA9dwlFEY8qLE05GHB/V0PuZ Ao/jqa8j5AAd9wR8FIZ6K7RUe8Zya2Y8SayHTkT8KDCcVbyrGWXzGbXLEMb2IexWdlSkgwpOFyitu JUjQ4dGrsXV5WoOuWngimlVppnjX5FKsAVbm0+zGZtX6LrP+cU2NI9VCFMIOrg0zh0XBFnqcrMJKV Y0NuvgGw==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmT-00Ee86-KY; Tue, 20 Apr 2021 03:10:34 +0000 Date: Tue, 20 Apr 2021 04:10:29 +0100 From: Matthew Wilcox To: Vineet Gupta Cc: "brouer@redhat.com" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "netdev@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mips@vger.kernel.org" , "ilias.apalodimas@linaro.org" , "mcroce@linux.microsoft.com" , "grygorii.strashko@ti.com" , "arnd@kernel.org" , "hch@lst.de" , "linux-snps-arc@lists.infradead.org" , "mhocko@kernel.org" , "mgorman@suse.de" Subject: Re: [PATCH 1/2] mm: Fix struct page layout on 32-bit systems Message-ID: <20210420031029.GI2531743@casper.infradead.org> References: <20210416230724.2519198-1-willy@infradead.org> <20210416230724.2519198-2-willy@infradead.org> <20210417024522.GP2531743@casper.infradead.org> <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org On Tue, Apr 20, 2021 at 02:48:17AM +0000, Vineet Gupta wrote: > > 32-bit architectures which expect 8-byte alignment for 8-byte integers > > and need 64-bit DMA addresses (arc, arm, mips, ppc) had their struct > > page inadvertently expanded in 2019. > > FWIW, ARC doesn't require 8 byte alignment for 8 byte integers. This is > only needed for 8-byte atomics due to the requirements of LLOCKD/SCOND > instructions. Ah, like x86? OK, great, I'll drop your arch from the list of affected. Thanks! _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc 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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 1B55CC433B4 for ; Tue, 20 Apr 2021 03:11:44 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 591866101C for ; Tue, 20 Apr 2021 03:11:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 591866101C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FPTHK5qL2z30CS for ; Tue, 20 Apr 2021 13:11:41 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=cmFm54dB; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=infradead.org (client-ip=2001:8b0:10b:1236::1; helo=casper.infradead.org; envelope-from=willy@infradead.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=cmFm54dB; dkim-atps=neutral Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FPTGq2ZBVz2xYk for ; Tue, 20 Apr 2021 13:11:14 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=AqTuRNKIkAmLe8Av3ztkUAdmYLIeq8PftziUxkdnED4=; b=cmFm54dBhWL/FJIZPa1qLdPQCh Hw3d+6yeN1BRhVLA8lXi0+OxBNGlwLN0iOxnz1tNw19z7dwED70uUHLHZ0QHCfVKNKBQenpL6sjTp RiTDO60rG0H/+Io0sMW2Sl9Yi8uXuQbOmHCm5NzIBmET6uhHQgkerVA9dwlFEY8qLE05GHB/V0PuZ Ao/jqa8j5AAd9wR8FIZ6K7RUe8Zya2Y8SayHTkT8KDCcVbyrGWXzGbXLEMb2IexWdlSkgwpOFyitu JUjQ4dGrsXV5WoOuWngimlVppnjX5FKsAVbm0+zGZtX6LrP+cU2NI9VCFMIOrg0zh0XBFnqcrMJKV Y0NuvgGw==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmT-00Ee86-KY; Tue, 20 Apr 2021 03:10:34 +0000 Date: Tue, 20 Apr 2021 04:10:29 +0100 From: Matthew Wilcox To: Vineet Gupta Subject: Re: [PATCH 1/2] mm: Fix struct page layout on 32-bit systems Message-ID: <20210420031029.GI2531743@casper.infradead.org> References: <20210416230724.2519198-1-willy@infradead.org> <20210416230724.2519198-2-willy@infradead.org> <20210417024522.GP2531743@casper.infradead.org> <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> 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: "arnd@kernel.org" , "grygorii.strashko@ti.com" , "netdev@vger.kernel.org" , "ilias.apalodimas@linaro.org" , "linux-kernel@vger.kernel.org" , "linux-mips@vger.kernel.org" , "mhocko@kernel.org" , "linux-mm@kvack.org" , "mgorman@suse.de" , "brouer@redhat.com" , "mcroce@linux.microsoft.com" , "linux-snps-arc@lists.infradead.org" , "linuxppc-dev@lists.ozlabs.org" , "hch@lst.de" , "linux-arm-kernel@lists.infradead.org" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Apr 20, 2021 at 02:48:17AM +0000, Vineet Gupta wrote: > > 32-bit architectures which expect 8-byte alignment for 8-byte integers > > and need 64-bit DMA addresses (arc, arm, mips, ppc) had their struct > > page inadvertently expanded in 2019. > > FWIW, ARC doesn't require 8 byte alignment for 8 byte integers. This is > only needed for 8-byte atomics due to the requirements of LLOCKD/SCOND > instructions. Ah, like x86? OK, great, I'll drop your arch from the list of affected. Thanks! 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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 5FAF8C433B4 for ; Tue, 20 Apr 2021 03:12:47 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 08D026101C for ; Tue, 20 Apr 2021 03:12:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 08D026101C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Oe3AqpZG0Om+e/qU8fj598hif1PWq7WfkYcx03K1/ZI=; b=Ek1s/7+2os1l85yJ6EpYv7Lgl jBajBlX+FcezIZgTCPkW20gLxkpDOd8wUWedh7gQWFXPHKUVjcKXjvQ18VfGWlArH9yKwWFRIMqQY GTZO/viby9goOp1bxKXhxitNs/EW6mCz7Bhsg5kKTmwQcG86m7GQdjTS6hPs2ndKbflVb340umHhT WPFY5utIhS6WSYV+4KWRB2Dy+xG+jL89vLV8mZ8Xx3+nT84kdO0zNpZ2lO817R4VXkw9JPlNLFaaD CC1D7X2pLOlFnPeyRIUtib8rJraCKEh6eKY3u1oFg/gl/tmsMHW8LqOmi3Ky9woykVX6oi/BMz2xB u8E0s+wvA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmj-00B2eo-Rw; Tue, 20 Apr 2021 03:10:46 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmh-00B2eg-0s; Tue, 20 Apr 2021 03:10:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=AqTuRNKIkAmLe8Av3ztkUAdmYLIeq8PftziUxkdnED4=; b=cmFm54dBhWL/FJIZPa1qLdPQCh Hw3d+6yeN1BRhVLA8lXi0+OxBNGlwLN0iOxnz1tNw19z7dwED70uUHLHZ0QHCfVKNKBQenpL6sjTp RiTDO60rG0H/+Io0sMW2Sl9Yi8uXuQbOmHCm5NzIBmET6uhHQgkerVA9dwlFEY8qLE05GHB/V0PuZ Ao/jqa8j5AAd9wR8FIZ6K7RUe8Zya2Y8SayHTkT8KDCcVbyrGWXzGbXLEMb2IexWdlSkgwpOFyitu JUjQ4dGrsXV5WoOuWngimlVppnjX5FKsAVbm0+zGZtX6LrP+cU2NI9VCFMIOrg0zh0XBFnqcrMJKV Y0NuvgGw==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lYgmT-00Ee86-KY; Tue, 20 Apr 2021 03:10:34 +0000 Date: Tue, 20 Apr 2021 04:10:29 +0100 From: Matthew Wilcox To: Vineet Gupta Cc: "brouer@redhat.com" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "netdev@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "linux-mips@vger.kernel.org" , "ilias.apalodimas@linaro.org" , "mcroce@linux.microsoft.com" , "grygorii.strashko@ti.com" , "arnd@kernel.org" , "hch@lst.de" , "linux-snps-arc@lists.infradead.org" , "mhocko@kernel.org" , "mgorman@suse.de" Subject: Re: [PATCH 1/2] mm: Fix struct page layout on 32-bit systems Message-ID: <20210420031029.GI2531743@casper.infradead.org> References: <20210416230724.2519198-1-willy@infradead.org> <20210416230724.2519198-2-willy@infradead.org> <20210417024522.GP2531743@casper.infradead.org> <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <9f99b0a0-f1c1-f3b0-5f84-3a4bfc711725@synopsys.com> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Apr 20, 2021 at 02:48:17AM +0000, Vineet Gupta wrote: > > 32-bit architectures which expect 8-byte alignment for 8-byte integers > > and need 64-bit DMA addresses (arc, arm, mips, ppc) had their struct > > page inadvertently expanded in 2019. > > FWIW, ARC doesn't require 8 byte alignment for 8 byte integers. This is > only needed for 8-byte atomics due to the requirements of LLOCKD/SCOND > instructions. Ah, like x86? OK, great, I'll drop your arch from the list of affected. Thanks! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel