[Buildroot] [PATCH] system/device_table.txt: add /dev/null entry

[Baruch Siach]

Hi Peter,

On Thu, Nov 27, 2014 at 11:24:38AM +0100, Peter Korsgaard wrote:
> >>>>> "Baruch" == Baruch Siach <baruch at tkos.co.il> writes:
>  >> With that said, if just adding /dev/null fixes it for you then we can
>  >> certainly add it. What about similar things like /dev/console, /dev/tty
>  >> or your serial port?
> 
>  > /dev/console is already in the rootfs.tar image, I'm not sure whare it comes 
>  > from. All other device nodes are later generated by mdev.
> 
> The only thing that comes to mind is that you are creating a cpio:
> 
> fs/cpio/cpio.mk:PACKAGES_PERMISSIONS_TABLE += /dev/console c 622 0 0 5 1 - - -$(sep)

You are right that I was creating a cpio, but apparently that's not the cause. 
Disabling the cpio image followed by 'make clean; make' didn't remove 
/dev/console. The code at fs/cpio/cpio.mk indicates that the above line always 
takes effect when !BR2_ROOTFS_DEVICE_CREATION_STATIC regardless of 
BR2_TARGET_ROOTFS_CPIO.

baruch

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