Are we still willing to pay the cost of moving include/linux/irqdesc.h into kernel/irq/?

[Jiang Liu <jiang.liu@linux.intel.com>]

Hi Thomas,
	When refining irq related data structures, I found once we had
a plan to move include/linux/irqdesc.h into kernel/irq/, and I have
basic ideas about how to achieve the goal as:
1) de-inline accessor functions in irqdesc.h and move the declaration
   into linux/irq.h.
2) remove reference to irq_desc->xxxx from drivers one by one (this
   step is simple)
3) remove reference to irq_desc->xxxx from arch (this step is hard)
4) move irqdesc.h into kernel/irq/

But are we still willing to pay the cost of converting inline access
helpers into normal functions?
One possible tradeoff is to remove reference of irq_desc->xxxx from
drivers/, which is straight forward and shouldn't cause serious
performance regressions:)

Thanks!
Gerry