x86: Speed up the irq_remapped check in hot pathes

irq_2_iommu is in struct irq_cfg, so we can do the irq_remapped check
based on irq_cfg instead of going through a lookup function. That's
especially interesting in the eoi_ioapic_irq() hotpath.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 0 insertions, 7 deletions

diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index a620b8bd8f4..ec87cd66f3e 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -54,13 +54,6 @@ static struct irq_2_iommu *irq_2_iommu(unsigned int irq)
         return cfg ? &cfg->irq_2_iommu : NULL;
 }
 
-int irq_remapped(int irq)
-{
-        struct irq_2_iommu *irq_iommu = irq_2_iommu(irq);
-
-        return irq_iommu ? irq_iommu->iommu != NULL : 0;
-}
-
 int get_irte(int irq, struct irte *entry)
 {
         struct irq_2_iommu *irq_iommu = irq_2_iommu(irq);