diff options
| author | Milton Miller <miltonm@bga.com> | 2011-05-10 23:30:36 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-19 09:31:59 +0400 |
| commit | 3ee62d365b519c0c18c774049efcde84fe51c60c (patch) | |
| tree | 7229d970675b0c5dff165d8597707ebc6e5798cc | |
| parent | 9553361499f9f9e8ca8c9dae2e103f651fa48217 (diff) | |
| download | linux-3ee62d365b519c0c18c774049efcde84fe51c60c.tar.xz | |
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>
| -rw-r--r-- | arch/powerpc/include/asm/irq.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xics/xics-common.c | 2 |
3 files changed, 8 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h index 6f4a3efb59a9..a65d1702643b 100644 --- a/arch/powerpc/include/asm/irq.h +++ b/arch/powerpc/include/asm/irq.h @@ -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); /** diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 0715a09a4101..73cf29078fef 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -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; diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c index 43b2a791e204..445c5a01b766 100644 --- a/arch/powerpc/sysdev/xics/xics-common.c +++ b/arch/powerpc/sysdev/xics/xics-common.c @@ -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. */ |