i2c-core: Make some code static

After the i2c-isa removal some code can become static.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/i2c-core.c

@@ -186,7 +186,7 @@ static struct device_attribute i2c_dev_attrs[] = {
 	{ },
 };
 
-struct bus_type i2c_bus_type = {
+static struct bus_type i2c_bus_type = {
 	.name		= "i2c",
 	.dev_attrs	= i2c_dev_attrs,
 	.match		= i2c_device_match,
@@ -197,7 +197,6 @@ struct bus_type i2c_bus_type = {
 	.suspend	= i2c_device_suspend,
 	.resume		= i2c_device_resume,
 };
-EXPORT_SYMBOL_GPL(i2c_bus_type);
 
 /**
  * i2c_new_device - instantiate an i2c device for use with a new style driver
@@ -281,7 +280,7 @@ EXPORT_SYMBOL_GPL(i2c_unregister_device);
 
 /* I2C bus adapters -- one roots each I2C or SMBUS segment */
 
-void i2c_adapter_dev_release(struct device *dev)
+static void i2c_adapter_dev_release(struct device *dev)
 {
 	struct i2c_adapter *adap = to_i2c_adapter(dev);
 	complete(&adap->dev_released);
@@ -299,7 +298,7 @@ static struct device_attribute i2c_adapter_attrs[] = {
 	{ },
 };
 
-struct class i2c_adapter_class = {
+static struct class i2c_adapter_class = {
 	.owner			= THIS_MODULE,
 	.name			= "i2c-adapter",
 	.dev_attrs		= i2c_adapter_attrs,

include/linux/i2c.h

@@ -35,8 +35,6 @@
 #include <linux/sched.h>	/* for completion */
 #include <linux/mutex.h>
 
-extern struct bus_type i2c_bus_type;
-
 /* --- General options ------------------------------------------------	*/
 
 struct i2c_msg;