Re: [PATCH] Add "is_power_of_2" checking to log2.h.

[Robert P. J. Day]

On Thu, 1 Feb 2007, David Howells wrote:

>
> Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/