Use the irq_set_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: Huacai Chen <chenhuacai@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 arch/loongarch/kernel/irq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c
index d129039b368b..80946cafaec1 100644
--- a/arch/loongarch/kernel/irq.c
+++ b/arch/loongarch/kernel/irq.c
@@ -92,9 +92,9 @@ int __init arch_probe_nr_irqs(void)
 	int nr_io_pics = bitmap_weight(loongson_sysconf.cores_io_master, NR_CPUS);
 
 	if (!cpu_has_avecint)
-		nr_irqs = (64 + NR_VECTORS * nr_io_pics);
+		irq_set_nr_irqs(64 + NR_VECTORS * nr_io_pics);
 	else
-		nr_irqs = (64 + NR_VECTORS * (nr_cpu_ids + nr_io_pics));
+		irq_set_nr_irqs(64 + NR_VECTORS * (nr_cpu_ids + nr_io_pics));
 
 	return NR_IRQS_LEGACY;
 }