[uClinux-dev] Kernel modules don't work on read-only filesystems ?

[Matt Waddel]

Hi Josue,

Since this is a read-only filesystem you need to add the device
as part of the deploy.  Depending on which platform you're using
go to the Makefile in uClinux/vendors/<manufacture>/<evb>/Makefile
and add scull0 there.  Look at the other devices included in the
Makefile for examples on how to do this.

Regards,
Matt

Josue de Freitas wrote:
> Hi people,
> 
> I'm trying to build the scull module example from Chapter 3 of Linux 
> Device Drivers book and it's not working. I create a /dev/scull0 (with 
> fixed major number, which is also configured on the module source) but 
> when I stand up the module and try something like "dd if=/dev/zero 
> of=/dev/scull0" it gives a message "dd: /dev/scull0: No such device".  
> According to the book a "cat /proc/devices" should show the scull device 
> when the module is up but nothing about scull is there, nothing changes 
> on /proc/devices with or without the module loaded.
> 
> So the main question is: dynamic module loading works perfectly on a 
> read-only filesystem on uClinux ?
> 
> 
> If this is not the best place to this kind of question, please tell me 
> where I can send this doubt. ;)
> 
> 
> Thanks in advance, Josue.
> 
> 
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