Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752597Ab1F3VNX (ORCPT ); Thu, 30 Jun 2011 17:13:23 -0400 Received: from mail-vw0-f46.google.com ([209.85.212.46]:34873 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752029Ab1F3VNN (ORCPT ); Thu, 30 Jun 2011 17:13:13 -0400 From: Will Drewry To: linux-kernel@vger.kernel.org Cc: kay.sievers@vrfy.org, akpm@linux-foundation.org, Will Drewry , Randy Dunlap , linux-doc@vger.kernel.org Subject: [PATCH v3 2/2] Documentation: add pointer to name_to_dev_t for root= values Date: Thu, 30 Jun 2011 16:10:07 -0500 Message-Id: <1309468207-24199-2-git-send-email-wad@chromium.org> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1309468207-24199-1-git-send-email-wad@chromium.org> References: <1309468207-24199-1-git-send-email-wad@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3496 Lines: 86 Updates kernel-parameters.txt to point users to the authoritative comment for name_to_dev_t. In addition, updates other places where some name_to_dev_t behavior was discussed. All other references to root= appear to be for explicit sample usage or just side comments when discussing other kernel parameters. Signed-off-by: Will Drewry --- Documentation/frv/booting.txt | 13 ++++++++++--- Documentation/kernel-parameters.txt | 1 + Documentation/m68k/kernel-options.txt | 14 ++++++++++++++ 3 files changed, 25 insertions(+), 3 deletions(-) diff --git a/Documentation/frv/booting.txt b/Documentation/frv/booting.txt index ace200b..37c4d84 100644 --- a/Documentation/frv/booting.txt +++ b/Documentation/frv/booting.txt @@ -106,13 +106,20 @@ separated by spaces: To use the first on-chip serial port at baud rate 115200, no parity, 8 bits, and no flow control. - (*) root=/dev/ + (*) root= - This specifies the device upon which the root filesystem resides. For - example: + This specifies the device upon which the root filesystem resides. It + may be specified by major and minor number, device path, or even + partition uuid, if supported. For example: /dev/nfs NFS root filesystem /dev/mtdblock3 Fourth RedBoot partition on the System Flash + PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=1 + first partition after the partition with the given UUID + 253:0 Device with major 253 and minor 0 + + Authoritative information can be found in + "Documentation/kernel-parameters.txt". (*) rw diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index fd248a3..c8e1737 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2234,6 +2234,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. ro [KNL] Mount root device read-only on boot root= [KNL] Root filesystem + See name_to_dev_t comment in init/do_mounts.c. rootdelay= [KNL] Delay (in seconds) to pause before attempting to mount the root filesystem diff --git a/Documentation/m68k/kernel-options.txt b/Documentation/m68k/kernel-options.txt index c93bed6..97d45f2 100644 --- a/Documentation/m68k/kernel-options.txt +++ b/Documentation/m68k/kernel-options.txt @@ -129,6 +129,20 @@ decimal 11 is the major of SCSI CD-ROMs, and the minor 0 stands for the first of these. You can find out all valid major numbers by looking into include/linux/major.h. +In addition to major and minor numbers, if the device containing your +root partition uses a partition table format with unique partition +identifiers, then you may use them. For instance, +"root=PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF". It is also +possible to reference another partition on the same device using a +known partition UUID as the starting point. For example, +if partition 5 of the device has the UUID of +00112233-4455-6677-8899-AABBCCDDEEFF then partition 3 may be found as +follows: + PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=-2 + +Authoritative information can be found in +"Documentation/kernel-parameters.txt". + 2.2) ro, rw ----------- -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/