linux-kernel - Re: [PATCH] MIPS: ath25: Avoid undefined early_serial_setup() without SERIAL_8250

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Date:   Tue, 14 Nov 2017 15:43:43 +0000
From:   Matt Redfearn <matt.redfearn@...s.com>
To:     Ralf Baechle <ralf@...ux-mips.org>
CC:     James Hogan <james.hogan@...s.com>, <linux-mips@...ux-mips.org>,
        <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] MIPS: ath25: Avoid undefined early_serial_setup() without
 SERIAL_8250_CONSOLE



On 14/11/17 14:05, Ralf Baechle wrote:
> On Tue, Nov 14, 2017 at 01:29:17PM +0000, Matt Redfearn wrote:
> 
>> Currently MIPS allnoconfig with CONFIG_ATH25=y fails to link due to
>> missing support for early_serial_setup():
>>
>>    LD      vmlinux
>> arch/mips/ath25/devices.o: In function ath25_serial_setup':
>> devices.c:(.init.text+0x68): undefined reference to 'early_serial_setup'
>>
>> Rather than adding dependencies to the platform to force inclusion of
>> SERIAL_8250_CONSOLE together with it's dependencies like TTY, HAS_IOMEM,
>> etc, just make ath25_serial_setup() a no-op when the dependency is not
>> selected in the kernel config.
> 
> Looks like arch/mips/rb532/serial.c might be suffering from the same
> issue?

Hi Ralf!

Indeed it does, and another unmet dependency. Patches incoming.

Thanks,
Matt

> 
>    Ralf
>