Re: [PATCH -rt] serial: 8250: fix shared interrupts issues underRT kernels

[Ingo Molnar]

* Anton Vorontsov <avorontsov@xxxxxxxxxxxxx> wrote:

> 8250's initialization routines relies on the fact that _irqsave 
> spinlock will disable local hardirqs, so that the driver can issue 
> IRQ-triggering operations before registering the port in the IRQ 
> chain.
> 
> With RT kernels and preemptable hardirqs this isn't true, _irqsave 
> spinlock does not disable local hardirqs, and this causes following 
> trace:

again, please let the -rt maintainers sort out which patches need to be 
propagated to upstream maintainers.

	Ingo
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