checkpatch: allow reporting C99 style comments

Presently C99 style comments are removed unconditionally before actual
patch validity check happens. This is a problem for some third party
projects which use checkpatch.pl but do not allow C99 style comments.

This patch adds yet another variable, named C99_COMMENT_TOLERANCE. If
it is included in the --ignore command line or config file options
list, C99 comments in the patch are reported as errors. Acked by
upstream maintainer (see
https://marc.info/?l=linux-kernel&m=154716219806454&w=2).

BUG=none
TEST=tried processing a patch with a C99 style comment, it passes the
     check just fine unless '--ignore C99_COMMENT_TOLERANCE' is
     present in .checkpatch.conf.

Change-Id: I5534b8e10be0aeec1e68dcb47ec80ec3f2b3fbdb
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1407531
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
1 file changed