Re: [PATCH 3/4] NOMMU: Make it possible for RomFS to use MTD devices directly

[Andrew Morton <akpm@linux-foundation.org>]

On Thu, 12 Feb 2009 10:40:10 +0000
David Howells <dhowells@redhat.com> wrote:

> Change RomFS so that it can use MTD devices directly - without the intercession
> of the block layer - as well as using block devices.
> 
> This permits RomFS:
> 
>  (1) to use the MTD direct mapping facility available under NOMMU conditions if
>      the underlying device is directly accessible by the CPU (including XIP);
> 
>  (2) and thus to be used when the block layer is disabled.
> 
> RomFS can be configured with support just for MTD devices, just for Block
> devices or for both.  If RomFS is configured for both, then it will treat
> mtdblock device files as MTD backing stores, not block layer backing stores.

My x86_64 usualconfig just exploded with

fs/romfs/storage.c:18:2: error: #error no ROMFS backing store interface configured

http://userweb.kernel.org/~akpm/config-akpm2.txt