On Tue, 6 Nov 2007, Boaz Harrosh wrote: > On Tue, Nov 06 2007 at 18:38 +0200, "Robert P. J. Day" <[EMAIL PROTECTED]> > wrote: > > While this macro is defined in terms of "is_power_of_2" and is > > therefore functionally equivalent, the visual semantics are sometimes > > more appropriate for what is actually being tested. > > > > Signed-off-by: Robert P. J. Day <[EMAIL PROTECTED]> > > > > --- > > > > diff --git a/include/linux/log2.h b/include/linux/log2.h > > index c8cf5e8..d0d324e 100644 > > --- a/include/linux/log2.h > > +++ b/include/linux/log2.h > > @@ -55,6 +55,12 @@ bool is_power_of_2(unsigned long n) > > } > > > > /* > > + * And for folks who want slightly different semantics ... > > + */ > > + > > +#define exactly_one_bit_set is_power_of_2 > > at_most_one_bit_set No?
no, it really is *exactly* one bit set. zero is not considered a power of two. 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 [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
