linux-kernel - Re: [Kgdb-bugreport] [PATCH 4/5] KGDB-8250: refactor configuration

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Date:	Wed, 06 Feb 2008 16:16:48 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Jan Kiszka <jan.kiszka@....de>
Cc:	Jason Wessel <jason.wessel@...driver.com>,
	kgdb-bugreport@...ts.sourceforge.net, Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Kgdb-bugreport] [PATCH 4/5] KGDB-8250: refactor configuration

Hello.

Jan Kiszka wrote:

>>>Sorry, previous version was missing some __init[data] attributes which
>>>were dropped in an intermediate stage. Here comes an updated patch:

>>><---snip--->

>>>This major refactoring of the quite complex kgdb8250 configuration does
>>>the following:

>>> - ensures that static configurations according to SERIAL_PORT_DFNS are
>>>   always loaded first
>>> - tries to pull more accurate configuration via serial8250_get_port_def
>>>   if simple-config is used
>>> - detects empty/invalid simple-configs
>>> - enforces KGDB_PORT_NUM <= SERIAL_8250_NR_UARTS at kconfig level
>>> - removes kgdb8250_add_port and its hook in serial_core (calling
>>>   serial8250_get_port_def in demand should provide us the same
>>>   information)

>>   You left powerpc-lite.patch broken with this change as it has
>>multiple calls to kgdb8250_add_port()...

> I see. But I wonder if there ever was a real need for these hooks (in
> 2.4 times?): If I look at bamboo_early_serial_map() e.g., I find it
> calling into early_serial_setup() which fills serial8250_ports[] - and
> that content is now retrieved via serial8250_get_port_def() when we
> parse the runtime or build-time provided parameters (port number &
> baudrate).

    Of course. But now the kgdb8250_add_port() calls need to be removed.

>>>Signed-off-by: Jan Kiszka <jan.kiszka@....de>

WBR, Sergei
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