[tip:irq/urgent] irqchip/stm32: Fix non-SMP build warning

[tip-bot for Arnd Bergmann]

Commit-ID:  a84277bf3efcc7bb5b5a5eec62de5c134cb47ee5
Gitweb:     https://git.kernel.org/tip/a84277bf3efcc7bb5b5a5eec62de5c134cb47ee5
Author:     Arnd Bergmann <arnd@xxxxxxxx>
AuthorDate: Tue, 5 Jun 2018 13:43:34 +0200
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 6 Jun 2018 12:05:19 +0200

irqchip/stm32: Fix non-SMP build warning

A CONFIG_SMP=n build emits a harmless compile-time warning:

drivers/irqchip/irq-stm32-exti.c:495:12: error: 'stm32_exti_h_set_affinity' defined but not used [-Werror=unused-function]

The #ifdef is inconsistent here, and it's better to use an IS_ENABLED() check
that lets the compiler silently drop that function.

Fixes: 927abfc4461e ("irqchip/stm32: Add stm32mp1 support with hierarchy domain")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Ludovic Barre <ludovic.barre@xxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
Cc: Radoslaw Pietrzyk <radoslaw.pietrzyk@xxxxxxxxx>
Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
Link: https://lkml.kernel.org/r/20180605114347.1347128-1-arnd@xxxxxxxx

---
 drivers/irqchip/irq-stm32-exti.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index 5089c1e2838d..3a7e8905a97e 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -552,9 +552,7 @@ static struct irq_chip stm32_exti_h_chip = {
 	.irq_set_type		= stm32_exti_h_set_type,
 	.irq_set_wake		= stm32_exti_h_set_wake,
 	.flags			= IRQCHIP_MASK_ON_SUSPEND,
-#ifdef CONFIG_SMP
-	.irq_set_affinity	= stm32_exti_h_set_affinity,
-#endif
+	.irq_set_affinity	= IS_ENABLED(CONFIG_SMP) ? stm32_exti_h_set_affinity : NULL,
 };
 
 static int stm32_exti_h_domain_alloc(struct irq_domain *dm,