linux-kernel - Re: [PATCH] serial: extend compile-test coverage

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Date:   Thu, 22 Apr 2021 09:40:38 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     kernel test robot <lkp@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kbuild-all@...ts.01.org,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] serial: extend compile-test coverage

Hi Johan,

On Thu, Apr 22, 2021 at 9:37 AM Johan Hovold <johan@...nel.org> wrote:
> On Thu, Apr 22, 2021 at 09:11:50AM +0200, Geert Uytterhoeven wrote:
> > On Thu, Apr 22, 2021 at 3:20 AM kernel test robot <lkp@...el.com> wrote:
> > > >> drivers/tty/serial/serial_txx9.c:987:12: warning: no previous prototype for function 'early_serial_txx9_setup' [-Wmissing-prototypes]
> > >    int __init early_serial_txx9_setup(struct uart_port *port)
> > >               ^
> > >    drivers/tty/serial/serial_txx9.c:987:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> > >    int __init early_serial_txx9_setup(struct uart_port *port)
> > >    ^
> > >    static
> > >    1 warning generated.
> >
> > This function is called from arch/mips/txx9/generic/setup.c, and does
> > have a forward declaration in arch/mips/include/asm/txx9/generic.h.
> > Unfortunately the latter cannot be included from the driver, unless
> > the || COMPILE_TEST is dropped again.
>
> Thanks, Geert. I was just about to send a v2 without the txx9 hunk.

well, I guess apart from this (W=1!) warning, this driver still
compile-tests fine.
Do we consider hard-to-fix W=1 warnings to be legitimate blockers
for enabling compile-testing?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds