linux-kernel - Re: [PATCH] ptrdiff_t is not uintptr

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Message-Id: <200708191812.44459.david-b@pacbell.net>
Date:	Sun, 19 Aug 2007 18:12:44 -0700
From:	David Brownell <david-b@...bell.net>
To:	Al Viro <viro@....linux.org.uk>
Cc:	Anton Altaparmakov <aia21@....ac.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ptrdiff_t is not uintptr_t, damnit

On Sunday 19 August 2007, Al Viro wrote:
> On Mon, Aug 20, 2007 at 01:27:13AM +0100, Anton Altaparmakov wrote:
> 
> > And what the cast was doing I can't remember.  I may well have just  
> > copied it from the VFS or I was perhaps trying to silence a warning  
> > and this happened to work...
> 
> ... due to sparse bug (it miscalculated address space of pointed to,
> picking top-level qualifiers for some reason; __user pointer to char
> and pointer to __user char gave the same result and so did __user long).
> That cast still made no sense...

I could believe that all came from sparse bugs.  Fixed now?
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