NFSv4: nfs4_proc_async_renew should use a GFP_NOFS allocation

We shouldn't allow the renew daemon to do direct reclaim on the NFS
partition.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/nfs4proc.c

@@ -3397,7 +3397,7 @@ int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
 
 	if (!atomic_inc_not_zero(&clp->cl_count))
 		return -EIO;
-	data = kmalloc(sizeof(*data), GFP_KERNEL);
+	data = kmalloc(sizeof(*data), GFP_NOFS);
 	if (data == NULL)
 		return -ENOMEM;
 	data->client = clp;