[PATCH] lcd: Provide dummy functions if CONFIG_LCD_CLASS_DEVICE is not set
STALE4586d
From: Alexander Shiyan <hidden>
Date: 2014-03-13 07:31:19
Subsystem:
the rest · Maintainer:
Linus Torvalds
Provide dummy functions for LCD register()/unregister() if CONFIG_LCD_CLASS_DEVICE is not set. Signed-off-by: Alexander Shiyan <redacted> --- include/linux/lcd.h | 37 ++++++++++++++++++++++++++++++------- 1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/include/linux/lcd.h b/include/linux/lcd.h
index 504f624..f1c94fd 100644
--- a/include/linux/lcd.h
+++ b/include/linux/lcd.h@@ -110,14 +110,37 @@ static inline void lcd_set_power(struct lcd_device *ld, int power) mutex_unlock(&ld->update_lock); } -extern struct lcd_device *lcd_device_register(const char *name, - struct device *parent, void *devdata, struct lcd_ops *ops); -extern struct lcd_device *devm_lcd_device_register(struct device *dev, - const char *name, struct device *parent, +#if defined(CONFIG_LCD_CLASS_DEVICE) || defined(CONFIG_LCD_CLASS_DEVICE_MODULE) +struct lcd_device *lcd_device_register(const char *name, struct device *parent, void *devdata, struct lcd_ops *ops); -extern void lcd_device_unregister(struct lcd_device *ld); -extern void devm_lcd_device_unregister(struct device *dev, - struct lcd_device *ld); +struct lcd_device *devm_lcd_device_register(struct device *dev, + const char *name, struct device *parent, void *devdata, + struct lcd_ops *ops); +void lcd_device_unregister(struct lcd_device *ld); +void devm_lcd_device_unregister(struct device *dev, struct lcd_device *ld); +#else +static inline struct lcd_device *lcd_device_register(const char *name, + struct device *parent, void *devdata, struct lcd_ops *ops) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct lcd_device *devm_lcd_device_register(struct device *dev, + const char *name, struct device *parent, void *devdata, + struct lcd_ops *ops) +{ + return ERR_PTR(-ENOSYS); +} + +static inline void lcd_device_unregister(struct lcd_device *ld) +{ +} + +static inline void devm_lcd_device_unregister(struct device *dev, + struct lcd_device *ld) +{ +} +#endif #define to_lcd_device(obj) container_of(obj, struct lcd_device, dev)
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1.8.3.2