nfsd: use nfs->ns.inum as net ID

Publishing of net pointer is not safe,
let's use nfs->ns.inum instead

Signed-off-by: Vasily Averin <[e-mail]>
Signed-off-by: J. Bruce Fields <[e-mail]>

fs/nfsd/nfs4state.c

···
 	nn->nfsd4_manager.block_opens = true;
 	locks_start_grace(net, &nn->nfsd4_manager);
 	nfsd4_client_tracking_init(net);
-	printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n",
-	       nn->nfsd4_grace, net);
+	printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n",
+	       nn->nfsd4_grace, net->ns.inum);
 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
 	return 0;
 }