Use the irq_get_nr_irqs() function instead of the global variable
'nr_irqs'. This patch prepares for changing 'nr_irqs' from an exported
global variable into a variable with file scope.

Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/char/hpet.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index e904e476e49a..48fe96ab4649 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -162,6 +162,7 @@ static irqreturn_t hpet_interrupt(int irq, void *data)
 
 static void hpet_timer_set_irq(struct hpet_dev *devp)
 {
+	const unsigned int nr_irqs = irq_get_nr_irqs();
 	unsigned long v;
 	int irq, gsi;
 	struct hpet_timer __iomem *timer;