Do locking around file descriptor, this allows caching of the file descriptor in the module.
Do locking around file descriptor, this allows caching of the file
descriptor in the module.

git-svn-id: 193148810cf65385f3a195dbc9a8b504846da3a2@24901 ec53bebd-3082-4978-b11e-865c3cabbd6b

madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal