Andrew Morton napisał(a):

> 
> +config ROMFS_ON_BLOCK
> +	bool "Block device-backed ROM file system support"
> +	depends on ROMFS_FS && BLOCK
> +	help
> +	  This permits ROMFS to use block devices buffered through the page
> +	  cache as the medium from which to retrieve data.  It does not allow
> +	  direct mapping of the medium.
> +
> +	  If unsure, answer Y.
> +
> +config ROMFS_ON_MTD
> +	bool "MTD-backed ROM file system support"
> +	depends on ROMFS_FS && MTD
> +	help
> +	  This permits ROMFS to use MTD based devices directly, without the
> +	  intercession of the block layer (which may have been disabled).  It
> +	  also allows direct mapping of MTD devices through romfs files under
> +	  NOMMU conditions if the underlying device is directly addressable by
> +	  the CPU.
> +
> 
> So we require that one of these be enabled if ROMFS.
> 
> There's a way of doing that, but I forget what it is.  iirc Adrian has done
> this in the past and can perhaps point us at an example?
> 

Yes, I change

# CONFIG_ROMFS_ON_BLOCK is not set

to

CONFIG_ROMFS_ON_BLOCK=y

And error goes away.

Thanks

I dont' have ROMFS_ON_MTD option in config.

-- 
Maciej Rutecki <maciej.rutecki@gmail.com>