global definition missing in kernel ext4 function

Question

trace_ext4_discard_blocks-- I wonder how and where do they implemented this fn., inside linux kernel code. Normal ctags, cscope didn't helps. I strongly suspect it is implemented somewhere in asm but I donno' how to catch this in code. Any pointers or tricks?

Answer 1

Here is the starting point for the tracepoint documentation.

Here is the definition of the function.

Here is where the TRACE_POINT macro ends up.