Man page 9 : __class_create

__class_create - create a struct class structure

struct class * __class_create(struct module *  owner , const char *  name , struct lock_class_key *  key );

owner
    pointer to the module that is to « own » this struct class

name
    pointer to a string for the name of this class.

key
    the lock_class_key for this class; used by mutex lock debugging

This is used to create a struct class pointer that can then be used in calls to device_create.

Returns struct class pointer on success, or ERR_PTR on error.

Note, the pointer created here is to be destroyed when finished by making a call to class_destroy.