linux-kernel - [PATCH] include/linux/interrupt.h: add dummy irq_set_irq_wake() for "!GENERIC

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Date:	Fri, 28 Jun 2013 09:23:08 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	paul.mckenney@...aro.org, josh@...htriplett.org,
	Ben Hutchings <bhutchings@...arflare.com>, decot@...glers.com
CC:	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] include/linux/interrupt.h: add dummy irq_set_irq_wake() for
 "!GENERIC_HARDIRQS"

Since irq_set_irq_wake() has already declared in header file, when
GENERIC_HARDIRQS enabled.

Recommend to define the dummy one for GENERIC_HARDIRQS disabled, and
also let the other related "static inline" functions are independent
from GENERIC_HARDIRQS.

So can avoid the compiling error below, and also let the code simpler
and clearer.

The related compiling error (ARCH=s390 allmodconfig):

  sound/soc/codecs/wm0010.c: In function ‘wm0010_spi_probe’:
  sound/soc/codecs/wm0010.c:976:2: error: implicit declaration of function ‘irq_set_irq_wake’ [-Werror=implicit-function-declaration]


Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 include/linux/interrupt.h |   23 ++++++++++-------------
 1 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 5fa5afe..1a311e0 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -344,16 +344,6 @@ static inline void enable_irq_lockdep_irqrestore(unsigned int irq, unsigned long
 /* IRQ wakeup (PM) control: */
 extern int irq_set_irq_wake(unsigned int irq, unsigned int on);
 
-static inline int enable_irq_wake(unsigned int irq)
-{
-	return irq_set_irq_wake(irq, 1);
-}
-
-static inline int disable_irq_wake(unsigned int irq)
-{
-	return irq_set_irq_wake(irq, 0);
-}
-
 #else /* !CONFIG_GENERIC_HARDIRQS */
 /*
  * NOTE: non-genirq architectures, if they want to support the lock
@@ -370,16 +360,23 @@ static inline int disable_irq_wake(unsigned int irq)
 						enable_irq(irq)
 # endif
 
-static inline int enable_irq_wake(unsigned int irq)
+/* IRQ wakeup (PM) control: */
+static inline int irq_set_irq_wake(unsigned int irq, unsigned int on)
 {
 	return 0;
 }
 
+#endif /* CONFIG_GENERIC_HARDIRQS */
+
+static inline int enable_irq_wake(unsigned int irq)
+{
+	return irq_set_irq_wake(irq, 1);
+}
+
 static inline int disable_irq_wake(unsigned int irq)
 {
-	return 0;
+	return irq_set_irq_wake(irq, 0);
 }
-#endif /* CONFIG_GENERIC_HARDIRQS */
 
 
 #ifdef CONFIG_IRQ_FORCED_THREADING
-- 
1.7.7.6
--
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