lkml.org 
[lkml]   [2007]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Add "is_power_of_2" checking to log2.h.
On Thu, 1 Feb 2007, David Howells wrote:

>
> Robert P. J. Day <rpjday@mindspring.com> wrote:
>
> > +#define is_power_of_4(x) is_power_of_2(x) && (ffs(x) & 1))
>
> If this is such a commonly implemented op, it should probably be implemented
> globally too.

there are only two checks of the form "is_power_of_4" in the entire
tree, and they're both in the power pc stuff, so i doubt it's worth
trying to formalize that in any way.

rday

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

http://www.fsdev.dreamhosters.com/wiki/index.php?title=Main_Page
========================================================================
-
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: 2007-02-01 11:53    [W:0.131 / U:0.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site