usr/src/sys/ufs/ffs/ufsmount.h

/*      ufsmount.h      3.1     %H%     */

/*
 * Mount structure.
 * One allocated on every mount.
 * Used to find the super block.
 */
struct  mount
{
        dev_t   m_dev;          /* device mounted */
        struct  buf *m_bufp;    /* pointer to superblock */
        struct  inode *m_inodp; /* pointer to mounted on inode */
} mount[NMOUNT];