SELinux: don't BUG if fs reuses a superblock
Eric Paris authored

I (wrongly) assumed that nfs_xdev_get_sb() would not ever share a superblock
and so cloning mount options would always be correct.  Turns out that isn't
the case and we could fall over a BUG_ON() that wasn't a BUG at all.  Since
there is little we can do to reconcile different mount options this patch
just leaves the sb alone and the first set of options wins.
Signed-off-by: default avatarEric Paris <eparis@redhat.com>
Acked-by: default avatarStephen Smalley <sds@tycho.nsa.gov>
Acked-by: default avatarTrond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
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