bitmap_find_next_zero_area_off (9) Linux Manual Page
bitmap_find_next_zero_area_off – find a contiguous aligned zero area
Synopsis
unsigned long bitmap_find_next_zero_area_off(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, unsigned long align_mask, unsigned long align_offset);Arguments
map
-
- The address to base the search on
size
- The bitmap size in bits
start
- The bitnumber to start searching at
nr
- The number of zeroed bits we’re looking for
align_mask
- Alignment mask for zero area
align_offset
- Alignment offset for zero area.
Description
The align_mask should be one less than a power of 2; the effect is that the bit offset of all zero areas this function finds plus align_offset is multiple of that power of 2.