centos man page for device_unregister

DEVICE_UNREGISTER(9)					   Device drivers infrastructure				      DEVICE_UNREGISTER(9)

NAME
       device_unregister - unregister device from system.

SYNOPSIS
       void device_unregister(struct device * dev);

ARGUMENTS
       dev
	   device going away.

DESCRIPTION
       We do this in two parts, like we do device_register. First, we remove it from all the subsystems with device_del, then we decrement the
       reference count via put_device. If that is the final reference count, the device will be cleaned up via device_release above. Otherwise,
       the structure will stick around until the final reference to the device is dropped.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      DEVICE_UNREGISTER(9)