The file_readahead setting in ide-cd and ide-floppy obviously
assumed read-ahead values are kept as bytes. This made them
totally useless. This patch unifies file_readahead with ide-disk
making values be stored correctly as pages and displayed as KB.

This also changes breada setting to match ide-disk as well (is it
really used at all? It appears the only place where it is referenced
is reiserfs).

The patch is agains Mandrake sources but as I assume it should apply to vanilla kernel as well.

cheers

-andrey