genirq: irqchip: Add mask to block out invalid irqs
Some controllers have irqs that aren't wired up and must never be used. For the generic chip attached to an irq_domain this provides a mask that can be used to block out particular irqs so that they never get mapped. Signed-off-by:Grant Likely <grant.likely@linaro.org> Link: http://lkml.kernel.org/r/1369793454-19197-2-git-send-email-grant.likely@linaro.orgSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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