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Subject[PATCH -next] arm64: Fix -Wunused-function warning
Date
If CONFIG_HOTPLUG_CPU is n, gcc warns:

arch/arm64/kernel/smp.c:967:13: warning: ‘ipi_teardown’ defined but not used [-Wunused-function]
static void ipi_teardown(int cpu)
^~~~~~~~~~~~

Use #ifdef guard this.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
arch/arm64/kernel/smp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index b6bde2675ccc..82e75fc2c903 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -82,9 +82,9 @@ static int nr_ipi __read_mostly = NR_IPI;
static struct irq_desc *ipi_desc[NR_IPI] __read_mostly;

static void ipi_setup(int cpu);
-static void ipi_teardown(int cpu);

#ifdef CONFIG_HOTPLUG_CPU
+static void ipi_teardown(int cpu);
static int op_cpu_kill(unsigned int cpu);
#else
static inline int op_cpu_kill(unsigned int cpu)
@@ -964,6 +964,7 @@ static void ipi_setup(int cpu)
enable_percpu_irq(ipi_irq_base + i, 0);
}

+#ifdef CONFIG_HOTPLUG_CPU
static void ipi_teardown(int cpu)
{
int i;
@@ -974,6 +975,7 @@ static void ipi_teardown(int cpu)
for (i = 0; i < nr_ipi; i++)
disable_percpu_irq(ipi_irq_base + i);
}
+#endif

void __init set_smp_ipi_range(int ipi_base, int n)
{
--
2.17.1
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