bitmap_find_free_region9
Find a contiguous aligned mem region
Usage
int bitmap_find_free_region(unsigned long * bitmap, unsigned int bits, int order);
Arguments
bitmap
array of unsigned longs corresponding to the bitmap
bits
number of bits in the bitmap
order
region size (log base 2 of number of bits) to find
Overview
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.
Releases
6 releases since Debian 4.0 (Etch); the text changed 5 times.