Re: [PATCH 0/6] add generic round_up_pow2() macro

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Andrew Morton wrote:
Nick Wilson <[email protected]> wrote:

The first patch adds a generic round_up_pow2() macro to kernel.h. The
remaining patches modify a few files to make use of the new macro.


We already have ALIGN() and roundup_pow_of_two().

cool. It doesn't handle x={0,1} though.
Maybe we should have:

static inline unsigned long __attribute_const__ __roundup_pow_of_two(unsigned long x)
{
        return (1UL << fls(x - 1));
}

static inline unsigned long __attribute_const__ roundup_pow_of_two(unsigned long x)
{
        return (unlikely(x<2)?2:__roundup_pow_of_two(x));
}

--
Pádraig Brady - http://www.pixelbeat.org
--
-
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/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux