I don't think it is a big problem. We can add virtual nodes. They way I
see it we either
a) put in grungy subsystem hacks
b) register virtual device nodes for subsystems when needed
b feels cleaner
> I really don't think it's _that_ difficult to properly do this blocking.
> For things like sound drivers, a simple semaphore is plenty enough. For
Sound is more easily handled by not blocking user space but waiting until
the final IRQ off moment and grabbing the registers. That avoids a lot
of ugly locking gunge. It literally comes down to
case suspending
kmalloc buffer
done
case final suspend point
turn off DMA
readl
readl
readl
readl
...
done
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