Description of problem:
I have working NFS mount but calling mount utility do not shows it.


Version-Release number of selected component (if applicable):
util-linux-ng-2.17.2-12.4.el6.s390x


How reproducible:
1 of 1 attempt


Steps to Reproduce:
1. # mount <fqdn>:/vol/exportstageprod /tmp/xxx
2. # ls /tmp/xxx   # good, I see data I do expect there
3. # mount | grep xxx
4. # grep xxx /etc/mtab
5. # grep xxx /proc/mounts 
<fqdn>:/vol/exportstageprod /tmp/xxx nfs rw,relatime,vers=3,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.10.76.29,mountvers=3,mountport=892,mountproto=udp,local_lock=none,addr=10.10.76.29 0 0


Actual results:
`mount` output do not contain the mount and /etc/mtab do not contain it as well


Expected results:
`mount` output and /etc/mtab content should be in sync with /proc/mounts