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Date: Wed, 27 Jul 2005 13:18:57 -0700
From: Andrew Morton <akpm@osdl.org>
To: Matt Porter <mporter@kernel.crashing.org>
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Cc: linux-kernel@vger.kernel.org, linuxppc-embedded@ozlabs.org
Subject: Re: [PATCH][1/3] ppc32: add 440ep support
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Matt Porter <mporter@kernel.crashing.org> wrote:
>
> +static u64 dma_mask = 0xffffffffULL;

I'm sure you're totally uninterested in this, but the above will probably
generate warnings on (say) ppc64, where u64 is implemented as unsigned
long.

I usually chuck a simple `-1' in there and the compiler always gets it
right, regardless of signedness and size and architecture.