Re: [Xen-devel] [PATCH 1/2] arm/xen: Correctly check if the event channel interrupt is present

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2015-02-12 at 06:34 +0000, Julien Grall wrote:
> The function irq_of_parse_and_map returns 0 when the IRQ is not found.
> 
> Furthermore xen_events_irq is only read when the CPU is bring up, so
> it's not necessary to use the attribute __read_mostly.

Part of the purpose of __read_mostly is to move such things out of
sharing cachelines with other more hot read/write things, as much as it
is to group all the "read only" things together.



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