<dec f='src/src/sys/dev/mm.h' l='48' type='int mm_md_open(dev_t , int , int , struct lwp * )'/>
<doc f='src/src/sys/dev/mm.h' l='43'>/*
 * Optional open() hook for MD.  Used by i386 for /dev/io emulation.
 *
 * machine/types.h must define __HAVE_MM_MD_OPEN to use this.
 */</doc>
