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=-19.4 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, URIBL_BLOCKED,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 A9D36C11F92 for ; Mon, 12 Jul 2021 07:29:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A02896113B for ; Mon, 12 Jul 2021 07:29:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346985AbhGLHbW (ORCPT ); Mon, 12 Jul 2021 03:31:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:39036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242762AbhGLHEJ (ORCPT ); Mon, 12 Jul 2021 03:04:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6AF8C610E6; Mon, 12 Jul 2021 07:01:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626073281; bh=9brvtHm5P1xX4on/zdIiSZ+3b4pLzhJ4IaEBj2zRwds=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BE6HjXSvh1QRN8Kk7HN8r8zn+zVgiFU23dzgpbTVGtNgbOUjvpm8ZMjOqWdpVJGlk i5sWbaN8p+NLfTJ4Q/ROoI02VboziQFA2Uh9ogwPaHNvkP2Mq4gV161DR6n7kAqEZ9 mqL30/4Ajlq2dRQ65WR5O6z2cysE3Yr0DVz1qIDs= 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 5.12 188/700] btrfs: disable build on platforms having page size 256K Date: Mon, 12 Jul 2021 08:04:31 +0200 Message-Id: <20210712060953.371952153@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@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 68b95ad82126..520a0f6a7d9e 100644 --- a/fs/btrfs/Kconfig +++ b/fs/btrfs/Kconfig @@ -18,6 +18,8 @@ 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