Re: [PATCH v2 01/26] genirq: add irq_domain-aware core IRQ handler

Russell King - ARM Linux
2014-09-01T15:22:48Z

On Tue, Aug 26, 2014 at 11:46:38AM -0700, Stephen Boyd wrote:
> Ah ok. This is the multi-irq handler case? Has this been broken since
> v3.2 at least for the gic users? Now that we call irq_enter()/irq_exit()
> a lot more code runs, including things like updating jiffies when
> interrupts arrive and invoking softirq? Do we only call irq_exit() on
> the IPI path otherwise?
>
> Are there any plans to send this back to stable trees? Not calling
> irq_enter()/irq_exit() when we get an interrupt seems like a big problem.

gic_handle_irq() calls handle_IRQ() which has the irq_enter()..irq_exit()
wrappers.

If we didn't have irq_exit(), then softirq's would be totally broken on
all gic-based platforms.

--
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.