[PATCH] NVMe: Reduce divide operations

[Matthew Wilcox]

On Fri, Nov 21, 2014 at 03:52:08PM +0000, Keith Busch wrote:
> On Fri, 21 Nov 2014, Matthew Wilcox wrote:
> >We could further optimise it by knowing that we need 0 pages if the I/O
> >is <= 8k in size:
> 
> I think that'll break if the first page has a non-zero offset, so
> we'd have to allow the overestimate if we want to keep this function
> simple. We could micro-optimize to return 0 if it's <= 4k, though.

Yes, sorry, you're right.