BACKUP_SRC_SIZE
buf = vzalloc(BACKUP_SRC_SIZE);
kbuf->bufsz = kbuf->memsz = BACKUP_SRC_SIZE;
crashk_res.start - BACKUP_SRC_SIZE);
BACKUP_SRC_SIZE);
if (size > BACKUP_SRC_SIZE) {
size -= BACKUP_SRC_SIZE;
ret = add_mem_range(mem_ranges, BACKUP_SRC_START, BACKUP_SRC_SIZE);