bitmap_find_free_region - find a contiguous aligned mem region
2. SYNOPSIS ▲
int bitmap_find_free_region(unsigned long * bitmap , int bits , int order );
3. ARGUMENTS ▲
array of unsigned longs corresponding to the bitmap
number of bits in the bitmap
region size (log base 2 of number of bits) to find
4. DESCRIPTION ▲
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.
5. COPYRIGHT ▲