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Date:   Fri, 6 Nov 2020 11:39:55 +0100
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Lee Jones <lee.jones@linaro.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: <20201106103955.GA2784089@kroah.com>
References: <20201104193549.4026187-1-lee.jones@linaro.org>
 <20201104193549.4026187-14-lee.jones@linaro.org>
 <20201106095326.GA2652562@kroah.com>
 <20201106100552.GA2063125@dell>
 <20201106101646.GB2063125@dell>
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On Fri, Nov 06, 2020 at 10:16:46AM +0000, Lee Jones wrote:
> 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).

I build on x86, and here's what I have set:

CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_16550A_VARIANTS=y
CONFIG_SERIAL_8250_FINTEK=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DMA=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_EXAR=y
CONFIG_SERIAL_8250_NR_UARTS=16
CONFIG_SERIAL_8250_RUNTIME_UARTS=8
CONFIG_SERIAL_8250_EXTENDED=y
# CONFIG_SERIAL_8250_MANY_PORTS is not set
# CONFIG_SERIAL_8250_SHARE_IRQ is not set
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
# CONFIG_SERIAL_8250_RSA is not set
CONFIG_SERIAL_8250_DWLIB=y
CONFIG_SERIAL_8250_DW=m
CONFIG_SERIAL_8250_RT288X=y
CONFIG_SERIAL_8250_UNIPHIER=m
CONFIG_SERIAL_8250_LPSS=y
CONFIG_SERIAL_8250_MID=y
CONFIG_SERIAL_8250_TEGRA=m