linux-kernel - [PATCH 02/14] irqchip: st: use __maybe_unused to hide st_irq_syscfg

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Date:	Wed,  2 Mar 2016 16:58:54 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: [PATCH 02/14] irqchip: st: use __maybe_unused to hide st_irq_syscfg_resume

the st irqchip driver uses SIMPLE_DEV_PM_OPS to conditionally
set its power management functions, but we get a warning
about st_irq_syscfg_resume being unused when CONFIG_PM is not
set:

drivers/irqchip/irq-st.c:183:12: error: 'st_irq_syscfg_resume' defined but not used [-Werror=unused-function]

This adds a __maybe_unused annotation so the compiler knows
it can silently drop it instead of warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/irqchip/irq-st.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-st.c b/drivers/irqchip/irq-st.c
index 9af48a85c16f..5e0e250db0be 100644
--- a/drivers/irqchip/irq-st.c
+++ b/drivers/irqchip/irq-st.c
@@ -180,7 +180,7 @@ static int st_irq_syscfg_probe(struct platform_device *pdev)
 	return st_irq_syscfg_enable(pdev);
 }
 
-static int st_irq_syscfg_resume(struct device *dev)
+static int __maybe_unused st_irq_syscfg_resume(struct device *dev)
 {
 	struct st_irq_syscfg *ddata = dev_get_drvdata(dev);
 
-- 
2.7.0