Re: [BUG 2.6.31-rc1] HIGHMEM64G causes hang in PCI init on 32-bit x86

Yinghai Lu
2009-06-30T23:14:27Z

Linus Torvalds wrote:
>
> On Tue, 30 Jun 2009, Linus Torvalds wrote:
>> I don't see any single-use trick then, and so it needs the whole statement
>> expression mess.
>
> Hmm. Does (((x)-1) | mask)+1) work?
>
> I haven't thought it fully through, but that _should_ take care of the
> "already aligned" case, no?

yes. that is right.

then how about
roundup(x,y)
round_up(x,y)

roundup doesn't need y is 2^n
but round_up does need y is 2^n, and only for x86

the name is confusing.

YH