linux-kernel - Re: [PATCH 1/1] unify DMA_..BIT

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Date:	Fri, 05 Oct 2007 13:43:54 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	bbpetkov@...oo.de, linux-kernel@...r.kernel.org, muli@...ibm.com,
	satyam@...radead.org, amitkale@...xen.com,
	achim_leubner@...ptec.com
Subject: Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1

Andrew Morton wrote:
> From: Andrew Morton <akpm@...ux-foundation.org>
>
> Now that we have DMA_BIT_MASK(), these macros are pointless.
>   

Except, unfortunately, DMA_64BIT_MASK.  I guess we could special case
it, assuming this works in all the contexts the macro is used in (ie,
compile-time constant?):

#define DMA_BIT_MASK(n)	(((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))



    J
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