Re: [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers

Benjamin Herrenschmidt
2006-11-19T20:19:56Z

On Sun, 2006-11-19 at 21:06 +0100, Ingo Molnar wrote:
> * Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
>
> > Wait wait wait .... Can somebody (Ingo ?) explain me why the fasteoi
> > handler is being changed and what is the rationale for adding an ack
> > that was not necessary before ?
>
> dont worry, it's -rt only stuff.

Still, I'm curious :-) Besides, there have been people talking about
having -rt work on ppc64 so ...

What do you need an ack() for on fasteoi ? On all fasteoi controllers I
have, ack is implicit by obtaining the vector number and all there is is
an eoi...

Cheers,
Ben.