lkml.org 
[lkml]   [2007]   [Oct]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/1] unify DMA_..BIT_MASK definitions: v3.1
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
========================================================================
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-10-05 23:11    [W:0.060 / U:4.224 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site