The fuser -mu displays wrong information for NFS file systems from NetApp qtrees

Issue

The fuser -mu command lists all processes in the whole NetApp volume, not in the mounted qtree only.

Example for /etc/fstab configuration:

<NetApp Filer>:/vol/<dir>/<share 1> /<mount point 1>  nfs  rw,rsize=65535,wsize=65535,vers=3,bg,hard,intr,proto=tcp  0  0
<NetApp Filer>:/vol/<dir>/<share 2> /<mount point 2>  nfs  rw,rsize=65535,wsize=65535,vers=3,bg,hard,intr,proto=tcp  0  0

Example of fuser output:

# fuser -mu -v <mount point 1> <mount point 2>
USER        PID ACCESS COMMAND
<mount point 1>: root       1627 ..c.. (root)<process>  # process from <mount point 2>
                 root       1636 ..c.. (root)<process>  # process from <mount point 1>
<mount point 2>: root       1627 ..c.. (root)<process>
                 root       1636 ..c.. (root)<process>