DO1                91 dev/pcmcia/if_xereg.h #define DO1	0xd
DO1                14 lib/libz/adler32.c #define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}
DO1               214 lib/libz/crc32.c #define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
DO1              4601 net/zlib.c     #define DO1(buf)  {s1 += *buf++; s2 += s1;}