Writing module in kernel 3.1.6

Hi, I am new to kernel programming, I have written one module to get vfs inode using path_lookup function in kernel 2.6.35. Now I am trying to compile same module under kernel 3.1.6 then i got some errors like ioctl undefined, path_lookup not present i.e error: implicit declaration of function ‘path_lookup’ . I have searched and used unlocked_ioctl insted of ioctl. But I am struggling to find function equivalent to path_lookup as in new kernel this function dose not exist. Can anyone suggest me proper function which dose the same job as path_lookup in 3.1.6? -- Regards, Swapnil Gaikwad.