[PATCH] gpio_free might sleep, mips architecture

[Uwe Kleine-König <ukleinek@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

According to the documentation gpio_free should only be called from task
context only.  To make this more explicit add a might sleep to all
implementations.

This patch changes the gpio_free implementations for the mips
architecture.

Signed-off-by: Uwe Kleine-König <ukleinek@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: Guennadi Liakhovetski <g.liakhovetski@xxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
---
 include/asm-mips/mach-au1x00/gpio.h  |    2 ++
 include/asm-mips/mach-bcm47xx/gpio.h |    3 +++
 include/asm-mips/mach-rc32434/gpio.h |    2 ++
 3 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/asm-mips/mach-au1x00/gpio.h b/include/asm-mips/mach-au1x00/gpio.h
index 2dc61e0..31eddba 100644
--- a/include/asm-mips/mach-au1x00/gpio.h
+++ b/include/asm-mips/mach-au1x00/gpio.h
@@ -1,6 +1,7 @@
 #ifndef _AU1XXX_GPIO_H_
 #define _AU1XXX_GPIO_H_
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 
 #define AU1XXX_GPIO_BASE	200
@@ -31,6 +32,7 @@ static inline int gpio_request(unsigned gpio, const char *label)
 static inline void gpio_free(unsigned gpio)
 {
 	/* Not yet implemented */
+	might_sleep();
 }
 
 static inline int gpio_direction_input(unsigned gpio)
diff --git a/include/asm-mips/mach-bcm47xx/gpio.h b/include/asm-mips/mach-bcm47xx/gpio.h
index cfc8f4d..af17ccd 100644
--- a/include/asm-mips/mach-bcm47xx/gpio.h
+++ b/include/asm-mips/mach-bcm47xx/gpio.h
@@ -9,6 +9,8 @@
 #ifndef __BCM47XX_GPIO_H
 #define __BCM47XX_GPIO_H
 
+#include <linux/kernel.h>
+
 #define BCM47XX_EXTIF_GPIO_LINES	5
 #define BCM47XX_CHIPCO_GPIO_LINES	16
 
@@ -25,6 +27,7 @@ static inline int gpio_request(unsigned gpio, const char *label)
 
 static inline void gpio_free(unsigned gpio)
 {
+	might_sleep();
 }
 
 static inline int gpio_to_irq(unsigned gpio)
diff --git a/include/asm-mips/mach-rc32434/gpio.h b/include/asm-mips/mach-rc32434/gpio.h
index f946f5f..9b4722e 100644
--- a/include/asm-mips/mach-rc32434/gpio.h
+++ b/include/asm-mips/mach-rc32434/gpio.h
@@ -13,6 +13,7 @@
 #ifndef _RC32434_GPIO_H_
 #define _RC32434_GPIO_H_
 
+#include <linux/kernel.h>
 #include <linux/types.h>
 
 struct rb532_gpio_reg {
@@ -88,6 +89,7 @@ static inline int gpio_request(unsigned gpio, const char *label)
 static inline void gpio_free(unsigned gpio)
 {
 	/* Not yet implemented */
+	might_sleep();
 }
 
 static inline int gpio_direction_input(unsigned gpio)
-- 
1.5.6.5