Man page 9 : bitmap_release_region

bitmap_release_region - release allocated bitmap region

void bitmap_release_region(unsigned long *  bitmap , int  pos , int  order );

bitmap
    array of unsigned longs corresponding to the bitmap

pos
    beginning of bit region to release

order
    region size (log base 2 of number of bits) to release

This is the complement to __bitmap_find_free_region and releases the found region (by clearing it in the bitmap).

No return value.