umin
int len = umin(length, MAXBSIZE); /* maximum block device transfer is MAXBSIZE */
m.initlen = umin(diskend - *diskaddr, /* the amount remaining to transfer */
m.stripesectors = umin(diskend - *diskaddr,
m.datalen = umin(rsectors, plex->stripesize); /* amount that will fit in this block */
m.datalen = umin(rsectors, plex->stripesize); /* amount that will fit in this block */
m.datalen = umin(m.stripesectors, plex->stripesize); /* and recalculate */