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Commit f2d34fd9 authored by Will Drewry's avatar Will Drewry Committed by Linus Torvalds
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Documentation: add pointer to name_to_dev_t for root= values 



Update 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: default avatarWill Drewry <wad@chromium.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2af14162

Documentation/frv/booting.txt

+10 −3
Original line number Diff line number Diff line
@@ -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/<xxxx>

  (*) root=<xxxx>



      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

Documentation/kernel-parameters.txt

+1 −0
Original line number Diff line number Diff line
@@ -2245,6 +2245,7 @@ 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

Documentation/m68k/kernel-options.txt

+14 −0
Original line number Diff line number Diff line
@@ -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

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