OS_AREA_SEGMENT_SIZE
BUILD_BUG_ON(sizeof(struct os_area_db) != 2 * OS_AREA_SEGMENT_SIZE);
const unsigned int buf_len = 8 * OS_AREA_SEGMENT_SIZE;
pos = header->db_area_offset * OS_AREA_SEGMENT_SIZE;
if (count < OS_AREA_SEGMENT_SIZE || verify_header(header) ||
+ OS_AREA_SEGMENT_SIZE);
+ header->db_area_offset * OS_AREA_SEGMENT_SIZE);