linux-kernel - Re: [Openipmi-developer] [PATCH 9/12] IPMI: add pigeonpoint poweroff

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Message-ID: <45757BD2.7020706@acm.org>
Date:	Tue, 05 Dec 2006 08:01:54 -0600
From:	Corey Minyard <minyard@....org>
To:	Randy Dunlap <randy.dunlap@...cle.com>
CC:	Bela Lubkin <blubkin@...are.com>, Andrew Morton <akpm@...l.org>,
	OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Joseph Barnett <jbarnett@...orola.com>
Subject: Re: [Openipmi-developer] [PATCH 9/12] IPMI: add pigeonpoint poweroff

Randy Dunlap wrote:
> Randy Dunlap wrote:
>> Bela Lubkin wrote:
>>> Andrew Morton wrote:
>>>
>>>>> Sometime, please go through the IPMI code looking for all these
>>>>> statically-allocated things which are initialised to 0 or NULL and
>>>>> remove
>>>>> all those intialisations?  They're unneeded, they increase the
>>>>> vmlinux
>>>>> image size and there are quite a number of them.  Thanks.
>>>
>>> Randy Dunlop replied:
>>>
>>>> I was just about to send that patch.  Here it is,
>>>> on top of the series-of-12.
>>> ...
>>>> -static int bt_debug = BT_DEBUG_OFF;
>>>> +static int bt_debug;
>>>
>>> Is it wise to significantly degrade code readability to work around
>>> a minor
>>> compiler / linker bug?
>>
>> Is that the only one that is a problem?
>>
>> I don't think it's a problem.  We *know* that static data areas
>> are init to 0.  Everything depends on that.  If that didn't work
>> it would all break.
>>
>> I could say that it's a nice coincidence that BT_DEBUG_OFF == 0,
>> but I think that it's more than coincidence.
>
> It's Corey's decision.  However, while code readability is also very
> important to me, I disagree with "significantly" above.
>
I think the optimizations are probably important enough that this should
be done.  Let's take Randy's patch and I will add a comment to
BT_DEBUG_OFF that says that the value must be zero to correspond to
the default uninitialized value.

-Corey

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