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From: "Robert P. J. Day" <rpjday@mindspring.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
	bbpetkov@yahoo.de, linux-kernel@vger.kernel.org, muli@il.ibm.com,
	satyam@infradead.org, amitkale@netxen.com,
	achim_leubner@adaptec.com
Subject: Re: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1
Date: Fri, 5 Oct 2007 17:03:28 -0400 (EDT)	[thread overview]
Message-ID: <Pine.LNX.4.64.0710051701530.12079@localhost.localdomain> (raw)
In-Reply-To: <20071005140050.655b7727.akpm@linux-foundation.org>

On Fri, 5 Oct 2007, Andrew Morton wrote:

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

or you could take advantage of the macros in kernel.h and write that
as:

+#define DMA_BIT_MASK(n)      (((n) == 64) ? ULLONG_MAX : ((1ULL<<(n))-1))

rday
-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://crashcourse.ca
========================================================================

  reply	other threads:[~2007-10-05 21:07 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-18 19:46 Borislav Petkov
2007-09-19 15:03 ` Satyam Sharma
2007-10-05 19:47 ` Andrew Morton
2007-10-05 20:43   ` Jeremy Fitzhardinge
2007-10-05 21:00     ` Andrew Morton
2007-10-05 21:03       ` Robert P. J. Day [this message]
2007-10-05 21:23         ` Jeremy Fitzhardinge
2007-10-06  7:54           ` Borislav Petkov
2007-10-05 21:24         ` Andreas Schwab
2007-10-05 21:28           ` Jeremy Fitzhardinge
2007-10-05 22:24             ` Andrew Morton
2007-10-05 22:32               ` Jeremy Fitzhardinge
2007-10-06  8:37       ` Borislav Petkov

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