Symbol: zfsctl_umount_snapshots
usr/src/uts/common/fs/zfs/sys/zfs_ctldir.h
55
int zfsctl_umount_snapshots(vfs_t *, int, cred_t *);
usr/src/uts/common/fs/zfs/zfs_vfsops.c
2300
(ret = zfsctl_umount_snapshots(vfsp, fflag, cr)) != 0) {