On Fri, Feb 24, 2012 at 03:56:52PM +0530, Rajendra Nayak wrote:

I don't know if we can, but even if we could, we take care of the same
bootargs working on two boards (say sdp and panda) *if* on sdp I have my
filesystem on eMMC and on panda I have it on external card.
What happens if I want to use my filesystem on both boards on external
card?

This is why the bootargs should be part of the information the boot
loader passes to the kernel, and not part of the kernel configuration
or DT.