[patch] bitmap.c: Speed up bitmap_find_bit.

[Kazu Hirata]

Hi Jeff,

> Before you install that patch you might do well to look at places
> where we are doing random or semi-random queries into the bitmaps.
> You'll likely get bigger improvements by avoiding the random
> bitmap queries rather than by twidding the bitmap code itself.

By the way, has the patch been approved?

It's not that I don't want to look at users of the sparse bitmap, but
I think this patch and conversion to sbitmap (or changing optimizers
to do linear access) are two separete problems because we cannot
simply switch everything to sbitmap.

Kazu Hirata