ftrace: Clarify code for mod command
ftrace: Clarify code for mod command

"Not" is too abstract variable name - changed to clear_filter.
Removed ftrace_match_module_records function: comparison with !* or *
not does the general code in filter_parse_regex() as it works without
mod command for
  sh# echo '!*' > /sys/kernel/debug/tracing/set_ftrace_filter

Link: http://lkml.kernel.org/r/1443545176-3215-2-git-send-email-395d9bb87d8fb3640a03a9e24bd55fe3dab2053e@gmail.com

Signed-off-by: Dmitry Safonov <395d9bb87d8fb3640a03a9e24bd55fe3dab2053e@gmail.com>
Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs