Initial ramdisk support does not work (for me) on 2.6.17.13

[Heiko Gerstung <heiko.gerstung@meinberg.de>]

Hi!

We are building embedded devices based on Linux and we use a ramdisk as
our root device in order to avoid problems with people switching off the
unit without a proper shutdown and to save write-cycles on our flash disc.

Using a 2.6.12 kernel it was no problem to boot the system by using this
kernel parameters:
load_ramdisk=1 console=tty0 initrd=initrd.gz rw  vga=769
ramdisk_size=32768 root=/dev/ram0

Today I tried to test run a 2.6.17.12 kernel using the same parameters
but I get this error message:
VFS: Cannot open root device "ram0" or unknown-block(1,0)
Please append a correct "root=" boot option

The RAMDISK driver seems to be initialized correctly and the initrd
image (gzipped ext2fs) contains a block device /dev/ram0 with major 1
and minor 0 ...

Any hints what has changed and how I can get this kernel to use a
ramdisk as its root device?

Thanks in advance,
best regards,
Heiko


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