Re: [patch] linux: New style IRQs for DECstation

[Jun Sun <jsun@mvista.com>]

Maciej W. Rozycki wrote:

> I can't see a reason why to handle this option in
> system-specific code.

How about "there will be likely no such CPUs/systems in the future"?

Your patch will force every new CPU to add FPUEX option to the cpu_option, 
where apparently no place really need to use it.

Leaving FPU exception enabled for a CPU that does not generate FPU exception 
is acceptable. (because it does *not* generate FPU exceptions).  And hooking 
up/dispatching the FPU exception interrupt is system-specific already anyway.
It, however, makes sense to provide a common wrapper code for fpu interrupt to 
jump to fpu exception handling code.
Over-abstraction can make the picture cloudy rather than clear.  My 2 cents.

Jun