NFS: release per-net clients lock before calling PipeFS dentries creation

	return err;

}

static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,

			    void *ptr)

static struct nfs_client *nfs_get_client_for_event(struct net *net, int event)

{

	struct super_block *sb = ptr;

	struct nfs_net *nn = net_generic(sb->s_fs_info, nfs_net_id);

	struct nfs_net *nn = net_generic(net, nfs_net_id);

	struct dentry *cl_dentry;

	struct nfs_client *clp;

	int error = 0;

	spin_lock(&nn->nfs_client_lock);

	list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {

		if (clp->rpc_ops != &nfs_v4_clientops)

			continue;

		cl_dentry = clp->cl_idmap->idmap_pipe->dentry;

		if (((event == RPC_PIPEFS_MOUNT) && cl_dentry) ||

		    ((event == RPC_PIPEFS_UMOUNT) && !cl_dentry))

			continue;

		atomic_inc(&clp->cl_count);

		spin_unlock(&nn->nfs_client_lock);

		return clp;

	}

	spin_unlock(&nn->nfs_client_lock);

	return NULL;

}

static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,

			    void *ptr)

{

	struct super_block *sb = ptr;

	struct nfs_client *clp;

	int error = 0;

	while ((clp = nfs_get_client_for_event(sb->s_fs_info, event))) {

		error = __rpc_pipefs_event(clp, event, sb);

		nfs_put_client(clp);

		if (error)

			break;

	}

	spin_unlock(&nn->nfs_client_lock);

	return error;

}