common/io/fd.c

2012 	uint_t ucount;
2059 	ucount = (uint_t)fdr.fdr_nbytes;
2065 		ucount += 16;
2066 		fdr.fdr_addr = kmem_zalloc(ucount, KM_SLEEP);
2069 			kmem_free(fdr.fdr_addr, ucount);
2085 		if (ucount) {
2093 			fdr.fdr_addr = kmem_alloc((size_t)ucount, KM_SLEEP);
2095 				if (ddi_copyin(uaddr, fdr.fdr_addr, ucount,
2097 					kmem_free(fdr.fdr_addr, ucount);
2110 		ucount = 0;
2118 		ucount = 0;
2135 	if (ucount && flag == B_READ && rval == 0) {
2136 		if (ddi_copyout(fdr.fdr_addr, uaddr, ucount, mode)) {
2144 	if (ucount)
2145 		kmem_free(fdr.fdr_addr, ucount);