Address_space_operations write_begin vs prepare_write ?

Hi, I am new to kernel coding and right now trying to implement address space operations on top of WrapFS. I noticed that the address_space_operations declaration has a field write_begin where I was expecting prepare_write. Is it just a change of name with newer versions of kernel or is there some significant change that has been made to it ? Thanks *Kunal Baweja* Undergraduate B.E. (Hons.) Computer Science Birla Institute Of Technology & Science, Pilani K.K. Birla Goa Campus +91 9049655665