On Wed, Jul 12, 2017 at 3:10 PM, Greg Kroah-Hartman
[off-list ref] wrote:

On Tue, Jul 11, 2017 at 03:35:15PM -0700, Linus Torvalds wrote:

quoted

[ Very random list of maintainers and mailing lists, at least
partially by number of warnings generated by gcc-7.1.1 that is then
correlated with the get_maintainers script ]

So I upgraded one of my boxes to F26, which upgraded the compiler to gcc-7.1.1

Which in turn means that my nice clean allmodconfig compile is not an
unholy mess of annoying new warnings.

I asked Arnd about this the other day on IRC as I've hit this as well on
the stable releases, and it's really annoying.  He mentioned that he had
lots of these warnings fixed, but didn't push most of the changes out
yet.

To clarify: most of the patches I wrote ended up getting merged, but
there were a couple that I did not submit a second time after they
got dropped, but I gave up on trying to fix the new -Wformat warnings
and simply disabled them, hoping someone else would do it before me,
or that the gcc developers would find a way to reduce the false-positive
ones before the release.

 Arnd, any repo with them in it that we could look at?

I have a private tree on my workstation that has lots of random
crap, and I rebase it all the time but normally don't publish it.

I have uploaded today's snapshot to

git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git randconfig-4.13-next

The way I work with this is helpful to catch build regressions as soon
as they happen, but not so good in finding things that I have either
submitted a patch for before and don't remember if it should be
resubmitted, or stuff that I decided I didn't want to deal with at some
point.

I was already planning to start over from scratch one of these days,
and cherry-pick+resubmit the patches that are actually required
for randconfig builds.

quoted

Anyway, it would be lovely if some of the more affected developers
would take a look at gcc-7.1.1 warnings. Right now I get about three
*thousand* lines of warnings from a "make allmodconfig" build, which
makes them a bit overwhelming.

I only have 310 when building the 4.12.0 release with 7.1.1, I wonder if
Fedora turned more warnings on in their compiler release, I'm running
Arch here:
        $ gcc --version
        gcc (GCC) 7.1.1 20170621

This is what I get in today's linux-next:

$ grep error: 4.13-next-allmod-warning | sed -e 's:^.*\[-W:-W:' | sort
| uniq -c | cut -f 1 -d\] | sort -n
      1 -Werror=parentheses
      2 -Werror=tautological-compare
      2 -Werror=unused-result
     34 -Werror=format-overflow=
     41 -Werror=int-in-bool-context
    233 -Werror=format-truncation=

I'll resubmit the patches for -Wparenthese, -Wtautological-compar,
-Wunused-result and -Wint-in-bool-context that I had sent earlier,
plus a new patch to move -Wformat-truncation into W=1.

      Arnd