A doubt regarding submit_bio()

Hello all, I am working on a operation in which I need to assure the order of bio_end_io() functions. Consider the scenario, If I submit two bio requests using submit_bio() function one after another, then is there any guarantee that the bio_end_io() for the bios will be invoked in the same order in which I submitted the bios? Basically I mean to say, would the generic block layer or I/O scheduler maintain the order of bios submitted to them? Hoping for some help. Regards, Gaurav.