linux-kernel - Re: [PATCH v1 6/6] perf build: Enable -Wthread-safety with clang

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Message-ID: <CAP-5=fVuSMcTnjRvjg-xT7yNuAHDcGMrHFE6CZUdPbMtG9eO-w@mail.gmail.com>
Date:   Thu, 18 Aug 2022 09:20:52 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
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        llvm@...ts.linux.dev
Subject: Re: [PATCH v1 6/6] perf build: Enable -Wthread-safety with clang

On Thu, Aug 18, 2022 at 8:59 AM Namhyung Kim <namhyung@...nel.org> wrote:
>
> On Thu, Aug 18, 2022 at 6:17 AM Ian Rogers <irogers@...gle.com> wrote:
> >
> > On Wed, Aug 17, 2022, 11:11 PM Namhyung Kim <namhyung@...nel.org> wrote:
> > >
> > > Hi Ian,
> > >
> > > On Tue, Aug 16, 2022 at 10:39 PM Ian Rogers <irogers@...gle.com> wrote:
> > > >
> > > > If building with clang then enable -Wthread-safety warnings.
> > >
> > > Do you know the minimal supported version for the option?
> > > I'm not sure we have a check for that kind of thing.
> >
> >
> > It has been supported for a long time, close to 10 years. Looking
> > around it looks like clang 3.5 had the support. For context, BPF was
> > supported after clang 3.7. Given this long support, and we don't
> > version check for BPF, I think it is okay to assume the flag is
> > supported.
>
> Good, thanks for checking it.

It was a good point, thanks for the reminder!

Ian