bitmap_find_free_region — find a contiguous aligned mem region
int bitmap_find_free_region ( | unsigned long * | bitmap, |
| int | bits, | |
| int | order); |
bitmaparray of unsigned longs corresponding to the bitmap
bitsnumber of bits in the bitmap
orderregion size (log base 2 of number of bits) to find
Find a region of free (zero) bits in a bitmap of bits bits and
allocate them (set them to one). Only consider regions of length
a power (order) of two, aligned to that power of two, which
makes the search algorithm much faster.
Return the bit offset in bitmap of the allocated region, or -errno on failure.