On 10/12/2020 17:44, Thomas Gleixner wrote:
On Thu, Dec 10 2020 at 17:09, Tvrtko Ursulin wrote:
On 10/12/2020 16:35, Thomas Gleixner wrote:
I'll send out a series addressing irq_to_desc() (ab)use all over the
place shortly. i915 is in there...
Yep we don't need atomic, my bad. And we would care about the shared
interrupt line. And without atomic the extra accounting falls way below
noise.
You have to be careful though. If you make the accumulated counter 64
bit wide then you need to be careful vs. 32bit machines.
Yep, thanks, I am bad jumping from one thing to another. Forgot about
the read side atomicity completely..
So in the light of it all, it sounds best I just quickly replace our
abuse with private counting and then you don't have to deal with it in
your series.
I mostly have it. Still chewing on the 32bit vs. 64bit thing. And
keeping it in my series allows me to remove the export of irq_to_desc()
at the end without waiting for your tree to be merged.
Give me a few.
Ok.
Regards,
Tvrtko
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