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Commit 3ee62d36 authored May 10, 2011 by Milton Miller Committed by Benjamin Herrenschmidt May 19, 2011

powerpc: Add virq_is_host to reduce virq_to_host usage



Some irq_host implementations are using virq_to_host to check if
they are the irq_host for a virtual irq.  To allow us to make space
versus time tradeoffs, replace this usage with an assertive
virq_is_host that confirms or denies the irq is associated with the
given irq_host.

Signed-off-by: Milton Miller <miltonm@bga.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 95533614

arch/powerpc/include/asm/irq.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -128,6 +128,7 @@ struct irq_host {
		struct irq_data;
		extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
		extern irq_hw_number_t virq_to_hw(unsigned int virq);
		extern bool virq_is_host(unsigned int virq, struct irq_host *host);
		extern struct irq_host *virq_to_host(unsigned int virq);

		/**

arch/powerpc/kernel/irq.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -510,6 +510,12 @@ irq_hw_number_t virq_to_hw(unsigned int virq)
		}
		EXPORT_SYMBOL_GPL(virq_to_hw);

		bool virq_is_host(unsigned int virq, struct irq_host *host)
		{
		return irq_map[virq].host == host;
		}
		EXPORT_SYMBOL_GPL(virq_is_host);

		struct irq_host *virq_to_host(unsigned int virq)
		{
		return irq_map[virq].host;

arch/powerpc/sysdev/xics/xics-common.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -213,7 +213,7 @@ void xics_migrate_irqs_away(void)
		/* We can't set affinity on ISA interrupts */
		if (virq < NUM_ISA_INTERRUPTS)
		continue;
		if (virq_to_host(virq) != xics_host)
		if (!virq_is_host(virq, xics_host))
		continue;
		irq = (unsigned int)virq_to_hw(virq);
		/* We need to get IPIs still. */