um_e2fs
fs = ump->um_e2fs;
fs = VFSTOUFS(mp)->um_e2fs;
struct m_ext2fs *fs = mp->um_e2fs;
struct m_ext2fs *fs = mp->um_e2fs;
fs = ump->um_e2fs;
fs = ump->um_e2fs;
fs = ump->um_e2fs;
fs = ump->um_e2fs;
ump->um_e2fs = m_fs;
kmem_free(ump->um_e2fs, sizeof(*m_fs));
fs = ump->um_e2fs;
fs = ump->um_e2fs;
fs = ump->um_e2fs;