linux-kernel - Re: [PATCH] the wrong variable checked after request

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Message-ID: <20070715220216.GF21668@ftp.linux.org.uk>
Date:	Sun, 15 Jul 2007 23:02:16 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	torvalds@...ux-foundation.org, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] the wrong variable checked after request_irq()

On Mon, Jul 16, 2007 at 07:40:38AM +1000, Benjamin Herrenschmidt wrote:
> On Sun, 2007-07-15 at 20:59 +0100, Al Viro wrote:
> > Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> 
> Acked-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> 
> Out of curiosity, how did you pick it up ? You have some automated tool
> to catch that (or sparse changes) or you just did -lots- of code
> inspection ?

While testing sparse changes, actually (comparing pointers to null
pointer constant spelled without a cast to void *)...  That gave several
hundred hits, most of them being immediately obvious (picking the lines
by file and line number and looking through the list had eliminated all
but about a dozen or two).  Several were not...
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