SUNRPC: Avoid digging into the ATOMIC pool

Page allocation requests made when the SPARSE_PAGES flag is set are
allowed to fail, and are not critical. No need to spend a rare
resource.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/socklib.c

@@ -106,7 +106,7 @@ xdr_partial_copy_from_skb(struct xdr_buf *xdr, unsigned int base, struct xdr_skb
 		/* ACL likes to be lazy in allocating pages - ACLs
 		 * are small by default but can get huge. */
 		if ((xdr->flags & XDRBUF_SPARSE_PAGES) && *ppage == NULL) {
-			*ppage = alloc_page(GFP_ATOMIC);
+			*ppage = alloc_page(GFP_NOWAIT | __GFP_NOWARN);
 			if (unlikely(*ppage == NULL)) {
 				if (copied == 0)
 					copied = -ENOMEM;

net/sunrpc/xprtrdma/rpc_rdma.c

@@ -238,7 +238,7 @@ rpcrdma_convert_iovs(struct rpcrdma_xprt *r_xprt, struct xdr_buf *xdrbuf,
 		 */
 		if (unlikely(xdrbuf->flags & XDRBUF_SPARSE_PAGES)) {
 			if (!*ppages)
-				*ppages = alloc_page(GFP_ATOMIC);
+				*ppages = alloc_page(GFP_NOWAIT | __GFP_NOWARN);
 			if (!*ppages)
 				return -ENOBUFS;
 		}