irq_domain/powerpc: Eliminate virq_is_host()

There is only one user, and it is trivial to open-code.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>

3 files changed, 6 insertions, 14 deletions

diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index abdd7ef28cbf..f80f262e0597 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -58,7 +58,6 @@ extern atomic_t ppc_n_lost_interrupts;
 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_domain *host);
 
 /**
  * irq_alloc_host - Allocate a new irq_domain data structure
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 03c95f03d792..269fbd5ac62f 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -510,13 +510,6 @@ 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_domain *host)
-{
-        struct irq_data *irq_data = irq_get_irq_data(virq);
-        return irq_data ? irq_data->domain == host : false;
-}
-EXPORT_SYMBOL_GPL(virq_is_host);
-
 static int default_irq_host_match(struct irq_domain *h, struct device_node *np)
 {
         return h->of_node != NULL && h->of_node == np;
diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index c4b3ce17029a..fb2e303d25fb 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -212,16 +212,16 @@ void xics_migrate_irqs_away(void)
                 /* We can't set affinity on ISA interrupts */
                 if (virq < NUM_ISA_INTERRUPTS)
                         continue;
-                if (!virq_is_host(virq, xics_host))
-                        continue;
-                irq = (unsigned int)virq_to_hw(virq);
-                /* We need to get IPIs still. */
-                if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS)
-                        continue;
                 desc = irq_to_desc(virq);
                 /* We only need to migrate enabled IRQS */
                 if (!desc || !desc->action)
                         continue;
+                if (desc->irq_data.domain != xics_host)
+                        continue;
+                irq = desc->irq_data.hwirq;
+                /* We need to get IPIs still. */
+                if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS)
+                        continue;
                 chip = irq_desc_get_chip(desc);
                 if (!chip || !chip->irq_set_affinity)
                         continue;