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Subject[PATCH] irqchip/bcm7038-l1: hide cpu offline callback when building for !SMP
Date
When compiling bmips with SMP disabled, the build fails with:

drivers/irqchip/irq-bcm7038-l1.o: In function `bcm7038_l1_cpu_offline':
drivers/irqchip/irq-bcm7038-l1.c:242: undefined reference to `irq_set_affinity_locked'
make[5]: *** [vmlinux] Error 1

Fix this by adding and setting bcm7038_l1_cpu_offline only when actually
compiling for SMP. It wouldn't have been used anyway, as it requires
CPU_HOTPLUG, which in turn requires SMP.

Fixes: 34c535793bcb ("irqchip/bcm7038-l1: Implement irq_cpu_offline() callback")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
drivers/irqchip/irq-bcm7038-l1.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-bcm7038-l1.c b/drivers/irqchip/irq-bcm7038-l1.c
index faf734ff4cf3..0f6e30e9009d 100644
--- a/drivers/irqchip/irq-bcm7038-l1.c
+++ b/drivers/irqchip/irq-bcm7038-l1.c
@@ -217,6 +217,7 @@ static int bcm7038_l1_set_affinity(struct irq_data *d,
return 0;
}

+#ifdef CONFIG_SMP
static void bcm7038_l1_cpu_offline(struct irq_data *d)
{
struct cpumask *mask = irq_data_get_affinity_mask(d);
@@ -241,6 +242,7 @@ static void bcm7038_l1_cpu_offline(struct irq_data *d)
}
irq_set_affinity_locked(d, &new_affinity, false);
}
+#endif

static int __init bcm7038_l1_init_one(struct device_node *dn,
unsigned int idx,
@@ -293,7 +295,9 @@ static struct irq_chip bcm7038_l1_irq_chip = {
.irq_mask = bcm7038_l1_mask,
.irq_unmask = bcm7038_l1_unmask,
.irq_set_affinity = bcm7038_l1_set_affinity,
+#ifdef CONFIG_SMP
.irq_cpu_offline = bcm7038_l1_cpu_offline,
+#endif
};

static int bcm7038_l1_map(struct irq_domain *d, unsigned int virq,
--
2.13.2
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