On Mon, 2009-03-02 at 13:04 -0800, David Brownell wrote:

On Monday 02 March 2009, Peter Zijlstra wrote:

quoted

IRQF_DISABLED is bonkers,

Hmm, after all the work that's been done to get Linux
to the point where *most* drivers run without IRQs
enabled ... that sentiment surprises me.

And I suspect it would surprise most driver developers.

How so?, its the natural extension of that work.

quoted

we should simply always disable interrupts for 
interrupt handlers.

That would be why you have refused to fix the bug
in lockdep, whereby it forcibly enables that flag?

I've been wondering for some months now why you've
left that bug unfixed.

Because running irq handlers with irqs enabled it plain silly.

Except it turns out there is some really broken ass hardware out there.
But supposedly IDE PIO could be done from a threaded handler.