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=-20.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,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 3140CC07E9D for ; Mon, 19 Jul 2021 15:00:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 201CC61181 for ; Mon, 19 Jul 2021 15:00:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242520AbhGSOT7 (ORCPT ); Mon, 19 Jul 2021 10:19:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:52200 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242112AbhGSORz (ORCPT ); Mon, 19 Jul 2021 10:17:55 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2753661003; Mon, 19 Jul 2021 14:58:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626706714; bh=iH675z0iLoR4ouZjcFqt7YDLzj9VRNuDKSKrS7DDiIo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PKZ3SWUANk6PrY6ySrYW8JEVScoDp/rqYEIZoszQo43M0PgiATd+e9GwpiZuowE8l MHLcycXrwQPwdV8zQ/EtpDX7JBnmat2ZKqXKxNMHoQ8HcZa36t4te/1ljNfiGxycWZ yA+cOL/h23U95UqzNnCbMuoSQK3dxVvXeCH0yUcw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, kernel test robot , Christophe Leroy , David Sterba , Sasha Levin Subject: [PATCH 4.4 039/188] btrfs: disable build on platforms having page size 256K Date: Mon, 19 Jul 2021 16:50:23 +0200 Message-Id: <20210719144922.233593086@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210719144913.076563739@linuxfoundation.org> References: <20210719144913.076563739@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christophe Leroy [ Upstream commit b05fbcc36be1f8597a1febef4892053a0b2f3f60 ] With a config having PAGE_SIZE set to 256K, BTRFS build fails with the following message include/linux/compiler_types.h:326:38: error: call to '__compiletime_assert_791' declared with attribute error: BUILD_BUG_ON failed: (BTRFS_MAX_COMPRESSED % PAGE_SIZE) != 0 BTRFS_MAX_COMPRESSED being 128K, BTRFS cannot support platforms with 256K pages at the time being. There are two platforms that can select 256K pages: - hexagon - powerpc Disable BTRFS when 256K page size is selected. Supporting this would require changes to the subpage mode that's currently being developed. Given that 256K is many times larger than page sizes commonly used and for what the algorithms and structures have been tuned, it's out of scope and disabling build is a reasonable option. Reported-by: kernel test robot Signed-off-by: Christophe Leroy [ update changelog ] Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig index 80e9c18ea64f..fd6b67c40d9d 100644 --- a/fs/btrfs/Kconfig +++ b/fs/btrfs/Kconfig @@ -9,6 +9,8 @@ config BTRFS_FS select RAID6_PQ select XOR_BLOCKS select SRCU + depends on !PPC_256K_PAGES # powerpc + depends on !PAGE_SIZE_256KB # hexagon help Btrfs is a general purpose copy-on-write filesystem with extents, -- 2.30.2