linux-kernel - [PATCH] driver core: warn unused return value for internal functions

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Date:	Mon, 9 Oct 2006 18:13:23 +0900
From:	akinobu.mita@...il.com (Akinobu Mita)
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH] driver core: warn unused return value for internal functions

This patch adds __must_check attribute to driver core internal functions
(drivers/base/base.h)

Cc: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>

 drivers/base/base.h |   31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

Index: work-fault-inject/drivers/base/base.h
===================================================================
--- work-fault-inject.orig/drivers/base/base.h	2006-10-09 15:06:23.000000000 +0900
+++ work-fault-inject/drivers/base/base.h	2006-10-09 15:09:30.000000000 +0900
@@ -1,35 +1,36 @@
+#include <linux/compiler.h>
 
 /* initialisation functions */
 
-extern int devices_init(void);
-extern int buses_init(void);
-extern int classes_init(void);
-extern int firmware_init(void);
+extern int __must_check devices_init(void);
+extern int __must_check buses_init(void);
+extern int __must_check classes_init(void);
+extern int __must_check firmware_init(void);
 #ifdef CONFIG_SYS_HYPERVISOR
-extern int hypervisor_init(void);
+extern int __must_check hypervisor_init(void);
 #else
 static inline int hypervisor_init(void) { return 0; }
 #endif
-extern int platform_bus_init(void);
-extern int system_bus_init(void);
-extern int cpu_dev_init(void);
-extern int attribute_container_init(void);
+extern int __must_check platform_bus_init(void);
+extern int __must_check system_bus_init(void);
+extern int __must_check cpu_dev_init(void);
+extern int __must_check attribute_container_init(void);
 
-extern int bus_add_device(struct device * dev);
-extern int bus_attach_device(struct device * dev);
+extern int __must_check bus_add_device(struct device * dev);
+extern int __must_check bus_attach_device(struct device * dev);
 extern void bus_remove_device(struct device * dev);
 extern struct bus_type *get_bus(struct bus_type * bus);
 extern void put_bus(struct bus_type * bus);
 
-extern int bus_add_driver(struct device_driver *);
+extern int __must_check bus_add_driver(struct device_driver *);
 extern void bus_remove_driver(struct device_driver *);
 
 extern void driver_detach(struct device_driver * drv);
-extern int driver_probe_device(struct device_driver *, struct device *);
+extern int __must_check driver_probe_device(struct device_driver *, struct device *);
 
 extern void sysdev_shutdown(void);
-extern int sysdev_suspend(pm_message_t state);
-extern int sysdev_resume(void);
+extern int __must_check sysdev_suspend(pm_message_t state);
+extern int __must_check sysdev_resume(void);
 
 static inline struct class_device *to_class_dev(struct kobject *obj)
 {
-
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