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Date: Sun, 22 Apr 2007 13:38:23 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Christoph Hellwig <hch@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
       "John Anthony Kazos Jr." <jakj@j-a-k-j.com>,
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       linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
       trivial@kernel.org
Subject: Re: [PATCH] utilities: add helper functions for safe 64-bit integer
 operations as 32-bit halves
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> > > over-engineering. Call it sector_upper32() do it the simple way and stop
> > > trying to solve a problem we don't have
> > 
> > James said we have the same problem with dma_addr_t.
> 
> Yes.  It's in fact the far more common case and we have a bread of
> macros dealing with the issue in various drivers.

So we still only need it for unsigned 32/64bit values ?



Alan