How to unwind stack to seek for specific caller?

[Lev Olshvang]

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