JFFS XConfig

JFFS XConfig

[David Mackay]

Hi,

We have downloaded the source of 2.4.12 and are using
XConfig to set compile parameters. We intend a system
with a 16M compact flash IDE device formatted as
JFFS2. However when it comes to JFFS2 the option is
greyed out, JFFS is however available for selection,
any thoughts?

Thanks, David

__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
http://uk.my.yahoo.com

Re: JFFS XConfig

[David Woodhouse]

monitoreurope@yahoo.co.uk said:
>  We have downloaded the source of 2.4.12 and are using XConfig to set
> compile parameters. We intend a system with a 16M compact flash IDE
> device formatted as JFFS2. However when it comes to JFFS2 the option
> is greyed out, JFFS is however available for selection, any thoughts? 

JFFS and JFFS2 will not be available unless you have selected CONFIG_MTD.

As you don't have any flash devices on your system and you want to use 
JFFS2 on a hard drive, you need to select the 'blkmtd' driver and configure 
it to use your CF drive as backing store for the faked MTD device.

--
dwmw2

Re: JFFS XConfig

[David Mackay]

 --- David Woodhouse <dwmw2@infradead.org> wrote: > 
> monitoreurope@yahoo.co.uk said:
> >  We have downloaded the source of 2.4.12 and are
> using XConfig to set
> > compile parameters. We intend a system with a 16M
> compact flash IDE
> > device formatted as JFFS2. However when it comes
> to JFFS2 the option
> > is greyed out, JFFS is however available for
> selection, any thoughts? 
> 
> JFFS and JFFS2 will not be available unless you have
> selected CONFIG_MTD.
> 
> As you don't have any flash devices on your system
> and you want to use 
> JFFS2 on a hard drive, you need to select the
> 'blkmtd' driver and configure 
> it to use your CF drive as backing store for the
> faked MTD device.
> 
> --
> dwmw2

Thanks for the advice David, however it appears still
not to be available with CONFID_MTD enabled. However
JFFS is available!

Any other ideas?

__________________________________________________
Do You Yahoo!?
Everything you'll ever need on one web page
from News and Sport to Email and Music Charts
http://uk.my.yahoo.com

Re: JFFS XConfig

[Jörn Engel]

Hi!

> > JFFS and JFFS2 will not be available unless you have
> > selected CONFIG_MTD.
> 
> Thanks for the advice David, however it appears still
> not to be available with CONFID_MTD enabled. However
> JFFS is available!
> 
> Any other ideas?

See linux/fs/Config.in. It should contain something like this:
dep_tristate 'Journalling Flash File System v2 (JFFS2) support' CONFIG_JFFS2_FS $CONFIG_MTD

It translates pretty much to David's previous answer. If you see this
and make xconfig still doesn't work but make menuconfig does, this is
a bug. If both don't, something looks seriously wrong. Make sure you
didn't cause it (stock kernel, no patches,...) and send some feedback.

Jörn

-- 
Do not stop an army on its way home.
-- Sun Tzu