[Angstrom-devel] initramfs vs mtdblock

[Koen Kooi]

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Michal Panczyk schreef:
| HI,
| I was wondering what devices use boot parameter root=/dev/mtdblockXXX.
| I am trying to figure out if there is a need for special fixing of
| files in packages/initrdscripts/files/ dir to make these scripts aware
| that some devices use plain "mtdX" (linux-handhelds-2.6) and some use
| /dev/mtdblockX. This would help in work with initramfs stuff that I
| try to launch on linux-2.6 devices (especially h5000).
|  So far I found following devices that have MTD_BLOCK=y in their
defconfig:

root=/dev/mtdblockX is the old way of accessing mtd devices, via a block
emulation layer. The mtd folks now say you need to access it directly,
via a virtual device: root=mtdX. The trouble with that is that the
initramfs scripts look for *real* device nodes and can't find the mtdX
ones, since they lack device nodes. There are two solutions that come to
mind:

* sed out 'block' when passing it to CMDLINE
* use /proc/mtd to get the partitions and add in 'block' when probing fstype

regards,

Koen
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