From patchwork Wed Sep 27 23:32:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Pitre X-Patchwork-Id: 114379 Delivered-To: patch@linaro.org Received: by 10.140.106.117 with SMTP id d108csp60522qgf; Wed, 27 Sep 2017 16:32:36 -0700 (PDT) X-Google-Smtp-Source: AOwi7QBD64XtJuQbLbP5r7H92lgnlsWTt+pXCSFVtxtTZwGsf84cwP3Zt7RhPaSBD6ohwe8OBdHR X-Received: by 10.101.91.66 with SMTP id y2mr2636564pgr.235.1506555156404; Wed, 27 Sep 2017 16:32:36 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1506555156; cv=none; d=google.com; s=arc-20160816; b=iPuC+Uxd1goDtDPTDa81qHsjB8w9u3n5gkJ7fq+u7+squRGBGQ1lg5X9Vs1Ps25nRS mq6PVlD3Y0IaTSQmZL3yk0+BiyhS5OdYz4b4IE/+ndgcHL0Ed4AFGYDbhlQAiV+qe1cj apF3uIOZb7xfg32HkgljobR7Sc5jyBdchHuWaUAtY6BUSRoUE3U6xSfgQyoGVBJvGVMX Y9dotKiOl3wQInIdr7mFvJBUrO64k+Kk2ZlCXVlbRODNgP7NlA+BBAQ0fb0LZhGCxFxY KS8LC7At5iZixG3jI0YskCW29qob6Qf/b+e1y54VZ4ABmb85FSrm2cEODkBMkLZNL6Hc iOdA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=vQq6HgG2FkLYF9vt5KJBPtbzwngLGnbD/fyWZ6cncgk=; b=dEM39Uip4OT07p0FiJS/1kSJ/JCGBlYuGBQZmHo3FUIyElLTQG5ZjdMuNVdm5+s0GS Ug+lZw2YXVkU0QBRQCCW0PuYNwV5JydgvfxaHxxbZ8WU1JFmMoBmv2p5mwpuCGSk9fKB hWaRNuQWrtCJMABsDQW1RsdsSqgcSJYj70hb4XwDlPIVyX2kppUqN66fiV0MMXV3HnMF /+1qlQioDvp7SwmYZoRCTKJBC3o3bF7kOivjk4EkWOLDO6Zxrr8L0cQqUYmCMcGzTYVG jvx5F0Z9Y2m/6/L/qipH1knHjLoMj/2HG3oa08ML7pe2IaS78+BInuJDGhHuGQXvfR95 5PKg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@pobox.com header.s=sasl header.b=ZkvLvEk7; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id h184si87799pge.571.2017.09.27.16.32.36; Wed, 27 Sep 2017 16:32:36 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@pobox.com header.s=sasl header.b=ZkvLvEk7; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752522AbdI0Xcd (ORCPT + 26 others); Wed, 27 Sep 2017 19:32:33 -0400 Received: from pb-smtp1.pobox.com ([64.147.108.70]:62192 "EHLO sasl.smtp.pobox.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752288AbdI0Xca (ORCPT ); Wed, 27 Sep 2017 19:32:30 -0400 Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by pb-smtp1.pobox.com (Postfix) with ESMTP id 3DF3C9954F; Wed, 27 Sep 2017 19:32:30 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=from:to:cc :subject:date:message-id:in-reply-to:references; s=sasl; bh=pul/ bqJBGIDrZnZxuDK2tIvPQU0=; b=ZkvLvEk72hgRn/Rwm0iSq+8BFoJkd6PUx52K gtogYpIq4jNuM/7jnVn9u20XSEsfPOYy4h3zckHqi/jCX1m4jfFAqtNMsrteERCs 0p1eCoDZvBIVRzse+zKu2bppOvGF+B3OWCGggsukxA0gUarfhKVLZP+FiXS12WWK IT/DS3Y= Received: from pb-smtp1.nyi.icgroup.com (unknown [127.0.0.1]) by pb-smtp1.pobox.com (Postfix) with ESMTP id 34C399954E; Wed, 27 Sep 2017 19:32:30 -0400 (EDT) Received: from yoda.home (unknown [137.175.234.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by pb-smtp1.pobox.com (Postfix) with ESMTPSA id A5F0099548; Wed, 27 Sep 2017 19:32:29 -0400 (EDT) Received: from xanadu.home (xanadu.home [192.168.2.2]) by yoda.home (Postfix) with ESMTP id F3FD22DA046A; Wed, 27 Sep 2017 19:32:28 -0400 (EDT) From: Nicolas Pitre To: Alexander Viro , linux-mm@kvack.org Cc: linux-fsdevel@vger.kernel.org, linux-embedded@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Brandt Subject: [PATCH v4 2/5] cramfs: make cramfs_physmem usable as root fs Date: Wed, 27 Sep 2017 19:32:21 -0400 Message-Id: <20170927233224.31676-3-nicolas.pitre@linaro.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20170927233224.31676-1-nicolas.pitre@linaro.org> References: <20170927233224.31676-1-nicolas.pitre@linaro.org> X-Pobox-Relay-ID: 20D40F6A-A3DC-11E7-9EBA-FE4B1A68708C-78420484!pb-smtp1.pobox.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Nicolas Pitre Tested-by: Chris Brandt --- init/do_mounts.c | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.9.5 diff --git a/init/do_mounts.c b/init/do_mounts.c index c2de5104aa..43b5817f60 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -556,6 +556,14 @@ void __init prepare_namespace(void) ssleep(root_delay); } + if (IS_ENABLED(CONFIG_CRAMFS_PHYSMEM) && root_fs_names && + !strcmp(root_fs_names, "cramfs_physmem")) { + int err = do_mount_root("cramfs", "cramfs_physmem", + root_mountflags, root_mount_data); + if (!err) + goto out; + } + /* * wait for the known devices to complete their probing *