Messages in this thread | | | Date | Tue, 3 Mar 2009 11:03:29 +0100 | From | Ingo Molnar <> | Subject | Re: lockdep and threaded IRQs (was: ...) |
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* Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > Therefore IRQF_DISABLED _will_ be forced on everybody some > > day soon, and I'll provide an IRQF_ENABLED for use by broken > > hardware only (and make a TAINT flag for that too). > > I don't think you understand how the kernel project works. If > everyone thinks your change is inappropriate it won't get in.
The change that people had a problem with was the immediate removal of IRQF_ENABLED, and that's not on the plate anymore.
I dont think anyone offered any example where IRQF_ENABLED is used in a healthy way - they are all legacy or special hw quirks where we limp along with enabling IRQs in a hacky way.
Furthermore, even these quirky cases can be supported cleanly _without_ IRQF_ENABLED: where an IRQ handler can take a long time to execute, the handler can be converted to a threaded IRQ handler - where it's fine to enable IRQs as there are no stack nesting issues.
So there's no real technical problem here.
Ingo
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