[PATCH -next] irqchip/apple-aic: Make symbol 'use_fast_ipi' static

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

The sparse tool complains as follows:

drivers/irqchip/irq-apple-aic.c:231:1: warning:
 symbol 'use_fast_ipi' was not declared. Should it be static?

This symbol is not used outside of irq-apple-aic.c, so marks it static.

Fixes: 2cf68211664a ("irqchip/apple-aic: Add Fast IPI support")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/irqchip/irq-apple-aic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 5ac83185ff47..1c2813ad8bbe 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c
@@ -228,7 +228,7 @@
 #define AIC_TMR_EL02_PHYS	AIC_TMR_GUEST_PHYS
 #define AIC_TMR_EL02_VIRT	AIC_TMR_GUEST_VIRT
 
-DEFINE_STATIC_KEY_TRUE(use_fast_ipi);
+static DEFINE_STATIC_KEY_TRUE(use_fast_ipi);
 
 struct aic_info {
 	int version;