[PATCH v2 0/5] ftrace: Clean up and comment code

[Steven Rostedt <rostedt@goodmis.org>]

While working on the function_graph multiple users code, I realized
that I was struggling with how the ftrace code worked. Being the
author of such code meant that it wasn't very intuitive. Namely, the
function names were not descriptive enough, or at least, they needed
comments.

This series moves to solve some of that via changing a couple function
names and parameters and adding comments to many of them.

There's more to do, but this at least moves it in the right direction.

Changes since v1: https://lore.kernel.org/all/20240604212817.384103202@goodmis.org/

- While working on v1 and responding to a comment from Mark Rutland about
  the usage of "ftrace_hash" in the __ftrace_hash_rec_update() code,
  I realized that the function does pretty much the same thing if
  it is set or not set (but slightly differently). It turns out that
  it isn't needed and that parameter can be removed, making the code
  simpler.

- Fixed some wording and typos suggested by Mark Rutland.

Steven Rostedt (Google) (5):
      ftrace: Rename dup_hash() and comment it
      ftrace: Remove "ftrace_hash" parameter from __ftrace_hash_rec_update()
      ftrace: Add comments to ftrace_hash_rec_disable/enable()
      ftrace: Convert "inc" parameter to bool in ftrace_hash_rec_update_modify()
      ftrace: Add comments to ftrace_hash_move() and friends

----
 kernel/trace/ftrace.c | 161 +++++++++++++++++++++++++++++---------------------
 1 file changed, 94 insertions(+), 67 deletions(-)