Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <CABWYdi06NUOWRLingNuybgZZsTZPjhmsOx-9oCGK94qZGYbzcw@mail.gmail.com>
 <CANiq72kvpiC-i53AXM-YsCUvWroHQemmqxsXjnB330ZEeHahUg@mail.gmail.com>
 <CABWYdi1zhTTaN-GSgH0DnPfz7p=SRw0wts5QVYYVtfvoiS0qnQ@mail.gmail.com>
 <CANiq72=fsL5m2_e+bNovFCHy3=YVf53EKGtGE_sWvsAD=ONHuQ@mail.gmail.com>
 <20190516225013.nvhwqi5tfwtby6qb@treble> <CABWYdi29E++jBw8boFZAiDZA7iT5NiJhnNmiHb-Rvd9+97hSVA@mail.gmail.com>
 <20190517050931.GB32367@kroah.com> <20190517073813.GB2589@hirez.programming.kicks-ass.net>
 <CANiq72nUPoNHWM-dJuFc3=4D2=8XMuvO0PgGPjviOv+EhrAWUw@mail.gmail.com> <20190517085126.GA3249@kroah.com>
In-Reply-To: <20190517085126.GA3249@kroah.com>
From:   Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date:   Fri, 17 May 2019 11:01:45 +0200
Message-ID: <CANiq72muyjE3XPjmtQgJpGaqWR=YBi6KVNT3qe-EMXP7x+q_rQ@mail.gmail.com>
Subject: Re: Linux 4.19 and GCC 9
To:     Greg KH <gregkh@linuxfoundation.org>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Ivan Babrou <ivan@cloudflare.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        kernel-team <kernel-team@cloudflare.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Fri, May 17, 2019 at 10:51 AM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Fri, May 17, 2019 at 10:35:29AM +0200, Miguel Ojeda wrote:
> > On Fri, May 17, 2019 at 9:38 AM Peter Zijlstra <peterz@infradead.org> wrote:
> > >
> > > Right; if there is anything you can reproduce on linus.git I'll happily
> > > have a look. If it doesn't reproduce all you have to do is find the
> > > patches that make it work and ask Greg.
> >
> > Just to clarify: Linus' master is clean of these issues with GCC 9.1.1.
>
> Great!  Care to find the patches that did that work and send me the git
> commit ids so that I can queue them up?  I don't have gcc9 here yet on
> my systems, so I can not test for this.

I am unsure about the perf and the objtools parts (Peter/Josh?), but
about the -Wmissing-attributes I cleaned, they were these:

a6e60d84989f ("include/linux/module.h: copy __init/__exit attrs to
init/cleanup_module")
c0d9782f5b6d ("Compiler Attributes: add support for __copy (gcc >= 9)")
ff98e20ef208 ("lib/crc32.c: mark crc32_le_base/__crc32c_le_base
aliases as __pure")

Cheers,
Miguel