[PATCH 3/6] powerpc: add memory map support to Freescale RapidIO block

[Li Yang]

On Wed, May 13, 2009 at 6:05 AM, Andrew Morton
<akpm at linux-foundation.org> wrote:
> On Tue, 12 May 2009 16:36:00 +0800
> Li Yang <leoli at freescale.com> wrote:
>
>> +     align = (size < 0x1000) ? 0x1000 : 1 << (__ilog2(size - 1) + 1);
>> +
>> +     /* Align the size */
>> +     if ((lstart + size) > (_ALIGN_DOWN(lstart, align) + align)) {
>
> __ilog2() and _ALIGN_DOWN() are powerpc-specific functions.  It would
> be preferable to use more general helpers if possible.  ALIGN() and ilog2()
> might suit here.

Will change to use ilog2().

_ALIGN_DOWN() gets a lower aligned address while ALIGN() gets a higher
address.  It seems that we don't have a general helper to do the same.

- Leo