Question2: Determine subarch type

[Alexander Shiyan]

Hello.

How can we determine the sub-architecture type from the driver code?
For example, we are building a multi-platform kernel for subarch A and B.
One of the drivers should be used for subarch A only, and can not be used for
subarch B. So, we need to avoid load this driver for other sub-architectures.
Of course, we can check all machines in the subarch with machine_is_xx() macro,
but I think that this is not the best way to do it.
Do we have another way to do this?

-- 
Alexander Shiyan <shc_work at mail.ru>