+/**
+ * ib_create_qp_kernel - Creates a kernel QP associated with the specified

Any reason this function is renamed?  This seems rather unrelated to
the rest of th patch.

+ *   protection domain.
  * @pd: The protection domain associated with the QP.
  * @qp_init_attr: A list of initial attributes required to create the
  *   QP.  If QP creation succeeds, then the attributes are updated to
  *   the actual capabilities of the created QP.
  * @caller: caller's build-time module name
- *
- * NOTE: for user qp use ib_create_qp_user with valid udata!
  */

Also a kerneldoc comment for a function that is an implementation
detail is actively harmful.  Please document ib_create_qp instead.