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docs: block: Document support for read-only partition in cmdline part

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Document support for read-only partition in cmdline partition for block
devices by appending "ro" after the (partition name).

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20241002221306.4403-3-ansuelsmth@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Christian Marangi 2024-10-03 00:11:42 +02:00 committed by Jens Axboe
parent ba40f4c590
commit 592e4deeab
1 changed files with 4 additions and 1 deletions
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Documentation/block/cmdline-partition.rst
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@ -39,13 +39,16 @@ blkdevparts=<blkdev-def>[;<blkdev-def>]
create a link to block device partition with the name "PARTNAME".
User space application can access partition by partition name.
ro
read-only. Flag the partition as read-only.
Example:
eMMC disk names are "mmcblk0" and "mmcblk0boot0".
bootargs::
'blkdevparts=mmcblk0:1G(data0),1G(data1),-;mmcblk0boot0:1m(boot),-(kernel)'
'blkdevparts=mmcblk0:1G(data0),1G(data1),-;mmcblk0boot0:1m(boot)ro,-(kernel)'
dmesg::