path: root/Documentation/m68k
diff options
authorWill Drewry <>2011-08-03 16:21:08 -0700
committerLinus Torvalds <>2011-08-03 14:25:21 -1000
commitf2d34fd9435c7e60cb5189d036efe9abfc911862 (patch)
treea62727adb201776c12d3cf69a76246fc6c4678e2 /Documentation/m68k
parent2af14162656b81bea9e03e76d7c5f1787cc86ea6 (diff)
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: Will Drewry <> Cc: Kay Sievers <> Cc: Randy Dunlap <> Cc: Namhyung Kim <> Cc: Trond Myklebust <> Cc: Jens Axboe <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'Documentation/m68k')
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/m68k/kernel-options.txt b/Documentation/m68k/kernel-options.txt
index c93bed66e25d..97d45f276fe6 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
+ PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=-2
+Authoritative information can be found in
2.2) ro, rw