linux-kernel - Re: [PATCH 2/2] serial: cpm_uart: Fix a COMPILE

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Date:   Tue, 23 May 2023 10:36:56 +0200
From:   Herve Codina <herve.codina@...tlin.com>
To:     Jiri Slaby <jirislaby@...nel.org>
Cc:     Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-serial@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH 2/2] serial: cpm_uart: Fix a COMPILE_TEST dependency

On Tue, 23 May 2023 09:52:00 +0200
Jiri Slaby <jirislaby@...nel.org> wrote:

> On 22. 05. 23, 10:20, Herve Codina wrote:
> > In a COMPILE_TEST configuration, the cpm_uart driver uses symbols from
> > the cpm_uart_cpm2.c file. This file is compiled only when CONFIG_CPM2 is
> > set.
> > 
> > Without this dependency, the linker fails with some missing symbols for
> > COMPILE_TEST configuration that needs SERIAL_CPM without enabling CPM2.
> > 
> > Signed-off-by: Herve Codina <herve.codina@...tlin.com>
> > Reported-by: kernel test robot <lkp@...el.com>
> > Link: https://lore.kernel.org/oe-kbuild-all/202305160221.9XgweObz-lkp@intel.com/
> > Fixes: e3e7b13bffae ("serial: allow COMPILE_TEST for some drivers")
> > ---
> >   drivers/tty/serial/Kconfig | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
> > index 625358f44419..68a9d9db9144 100644
> > --- a/drivers/tty/serial/Kconfig
> > +++ b/drivers/tty/serial/Kconfig
> > @@ -769,7 +769,7 @@ config SERIAL_PMACZILOG_CONSOLE
> >   
> >   config SERIAL_CPM
> >   	tristate "CPM SCC/SMC serial port support"
> > -	depends on CPM2 || CPM1 || (PPC32 && COMPILE_TEST)
> > +	depends on CPM2 || CPM1 || (PPC32 && CPM2 && COMPILE_TEST)  
> 
> Actually, does this makes sense? I mean, the last part after "||" is now 
> superfluous and doesn't help anything, right?

Indeed, I will remove all the (PPC32 && CPM2 && COMPILE_TEST) in the next
iteration.
I will also remove the '#elif defined(CONFIG_COMPILE_TEST)' case in the
cpm_uart.h file.

Best regards,
Hervé

> 
> >   	select SERIAL_CORE
> >   	help
> >   	  This driver supports the SCC and SMC serial ports on Motorola  
>