How to unwind stack to seek for specific caller?

Hello all I know that I can print stack of function using dump_stack() But I need to find out whether my function y() was called from linux kernel function x().\ I see that kmsg_dump_get_buffer() function can get kernel messages but it is not clear for me should I use it bedore calling dump_stack or I need to do additional setup before calling for these 2 functions? Regards, Lev