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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed, 23 Feb 2022 13:53:39 -0800
Message-ID: <CAHk-=wh97QY9fEQUK6zMVQwaQ_JWDvR=R+TxQ_0OYrMHQ+egvQ@mail.gmail.com>
Subject: Re: [RFC PATCH 03/13] usb: remove the usage of the list iterator
 after the loop
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Jakob <jakobkoschel@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-arch <linux-arch@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Kees Cook <keescook@chromium.org>,
        Mike Rapoport <rppt@kernel.org>,
        "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
        Brian Johannesmeyer <bjohannesmeyer@gmail.com>,
        Cristiano Giuffrida <c.giuffrida@vu.nl>,
        "Bos, H.J." <h.j.bos@vu.nl>, Nathan Chancellor <nathan@kernel.org>
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On Wed, Feb 23, 2022 at 1:46 PM Arnd Bergmann <arnd@arndb.de> wrote:
>
> > Ok, so we should be able to basically convert '--std=gnu89' into
> > '--std=gnu11 -Wno-shift-negative-value' with no expected change of
> > behavior.
>
> Yes, I think that is correct.

Ok, somebody please remind me, and let's just try this early in the
5.18 merge window.

Because at least for me, doing

-                  -std=gnu89
+                  -std=gnu11 -Wno-shift-negative-value

for KBUILD_CFLAGS works fine both in my gcc and clang builds. But
that's obviously just one version of each.

(I left the host compiler flags alone - I have this memory of us
having had issues with people having old host compilers and wanting
headers for tools still build with gcc-4)

                Linus