[PATCH 0/3] ceph: fix a few problems in ceph_dir_*_complete()

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This series fixes a possible null pointer dereference in
ceph_dir_set_complete().

It also fixes the ceph-private implementation of
__d_find_any_alias() so it takes a reference to the
returned dentry.  In addition, getting that reference
to the dentry requires the Linux inode lock, so ensure
that is taken by (duplicating and) using the locking
form of that function, d_find_any_alias().

					-Alex

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