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Date:   Fri, 6 Nov 2020 10:16:46 +0000
From:   Lee Jones <lee.jones@linaro.org>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     linux-kernel@vger.kernel.org, Jiri Slaby <jirislaby@kernel.org>,
        Mike Hudson <Exoray@isys.ca>, linux-serial@vger.kernel.org
Subject: Re: [PATCH 13/36] tty: serial: 8250: 8250_port: Staticify functions
 referenced by pointers
Message-ID: <20201106101646.GB2063125@dell>
References: <20201104193549.4026187-1-lee.jones@linaro.org>
 <20201104193549.4026187-14-lee.jones@linaro.org>
 <20201106095326.GA2652562@kroah.com>
 <20201106100552.GA2063125@dell>
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On Fri, 06 Nov 2020, Lee Jones wrote:

> On Fri, 06 Nov 2020, Greg Kroah-Hartman wrote:
> 
> > On Wed, Nov 04, 2020 at 07:35:26PM +0000, Lee Jones wrote:
> > > Fixes the following W=1 kernel build warning(s):
> > > 
> > >  drivers/tty/serial/8250/8250_port.c:349:14: warning: no previous prototype for ‘au_serial_in’ [-Wmissing-prototypes]
> > >  drivers/tty/serial/8250/8250_port.c:359:6: warning: no previous prototype for ‘au_serial_out’ [-Wmissing-prototypes]
> > > 
> > > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > Cc: Jiri Slaby <jirislaby@kernel.org>
> > > Cc: Mike Hudson <Exoray@isys.ca>
> > > Cc: linux-serial@vger.kernel.org
> > > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > > ---
> > >  drivers/tty/serial/8250/8250_port.c | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > And now I get build errors of:
> > 	ld: drivers/tty/serial/8250/8250_early.o: in function `early_au_setup':
> > 	8250_early.c:(.init.text+0x7): undefined reference to `au_serial_in'
> > 	ld: 8250_early.c:(.init.text+0xf): undefined reference to `au_serial_out'
> > 	make: *** [Makefile:1164: vmlinux] Error 1
> > 
> 
> I *always* test build my sets before posting.
> 
> /investigating

What config failed for you?

It looks as though SERIAL_8250_CONSOLE is a bool and doesn't appear to
be compiled with allmodconfig builds for any architecture that I test
against (Arm, Arm64, MIPS, PPC, x86).

> > perhaps W=1 was wrong here...

NEVER! ;)

The prototype just needs moving is all.

I'll fix the issue and re-post an alternative patch.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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