CDATA
if (CDATA(curr) +
dev_bshift) < CDATA(curr) ||
CDATA(curr) +
dev_bshift) > CDATA(curr) + CSIZE) {
CDATA(curr) + ((blkno -
CDATA(curr));
memcpy(buf, CDATA(curr) +
CDATA(&cdesc[idx]), rsize);