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Date: Sat, 28 Mar 2009 20:17:34 +0100
From: Christoph Mallon <christoph.mallon@gmx.de>
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To: Julian Elischer <julian@elischer.org>
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Cc: src-committers@FreeBSD.org, svn-src-all@FreeBSD.org, avg@FreeBSD.org,
	marius@alchemy.franken.de, svn-src-head@FreeBSD.org,
	"M. Warner Losh" <imp@bsdimp.com>
Subject: Re: svn commit: r190098 - in head/sys/sparc64: fhc sparc64
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Julian Elischer schrieb:
> M. Warner Losh wrote:
>> In message: <49C5F88C.3070600@freebsd.org>
>>             Andriy Gapon <avg@freebsd.org> writes:
>> : E.g. you can have a simple 3 line block where you need a local variable
>> : but that block is located 50 lines from start of an enclosing function.
>> : Very convenient when you need to quickly glance the variable's type 
>> (not).
>>
>> No you don't.  There's absolutely nothing wrong with putting them at
>> the top.  In fact, it is simpler, really, than having to go hunting
>> for dozens of different declarations.  As someone who has spent a lot
>> of time looking at code, the time wasted looking for these damn-fool
>> things really adds up.
> 
> and in a complicated function, if you have them all over the place you 
> have no idea as to what the potential stack usage of the function is..
> This matters in the kernel.

The declared local variables are neither a lower *nor* an upper bound 
for stack usage.