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If you have two interfaces, whose subnets you want to advertise to the OSPF topology (as internal OSPF routes), you'll need to insure their IP addresses are both "covered" by one or more network statements. OSPF, by default, will transmit and look for OSPF hellos on those interfaces too. Since you note you only want one interface, of the two to do this, either you must define the interface you don't want OSPF hello processing on as passive, or change the default to make all OSPF interfaces passive, and then define the interface you do want OSPF hello processing on as not-passive.
Either approach obtains the same results but depending on the ratio of passive to non-passive interfaces, the number of configuration statements can vary considerably.
