NFS: restore module put when manager exits.
Commit f49169c9 ("NFSD: Remove svc_serv_ops::svo_module") removed calls to module_put_and_kthread_exit() from threads that acted as SUNRPC servers and had a related svc_serv_ops structure. This was correct. It ALSO removed the module_put_and_kthread_exit() call from nfs4_run_state_manager() which is NOT a SUNRPC service. Consequently every time the NFSv4 state manager runs the module count increments and won't be decremented. So the nfsv4 module cannot be unloaded. So restore the module_put_and_kthread_exit() call. Fixes: f49169c9 ("NFSD: Remove svc_serv_ops::svo_module") Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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