linux-kernel - Re: block/bsg.c

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Date:	Mon, 16 Jul 2007 21:12:26 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Jens Axboe <jens.axboe@...cle.com>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: block/bsg.c

Andrew Morton wrote:
> Yup, but the concern (from Al, iirc) was that someone could change the code
> later on, add a new bug and have that bug hidden by the unneeded
> initialisation.

True.

That's why #gccbug went the safe route, took the cost of extra 
instructions, and initialized it to zero.


> uninitialized_var() has the advantage that it generates no code, whereas "=
> 0" often adds instructions.  Plus of course it is self-documenting, greppable-for
> and centrally alterable.

Agreed.

	Jeff


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