--- /dev/null	2018-06-20 11:01:03.657616567 -0700
+++ new/src/jdk.net/linux/native/libextnet/RdmaPollSelectorImpl.c	2018-06-22 12:23:49.920672116 -0700
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <rdma/rsocket.h>
+
+#include "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "jlong.h"
+#include "nio.h"
+#include "rdma_ch_RdmaPollSelectorImpl.h"
+
+JNIEXPORT jint JNICALL
+Java_rdma_ch_RdmaPollSelectorImpl_poll0(JNIEnv *env, jclass clazz,
+                                      jlong address, jint numfds,
+                                      jint timeout)
+{
+    struct pollfd *a;
+    int res;
+
+    a = (struct pollfd *) jlong_to_ptr(address);
+    res = rpoll(a, numfds, timeout);
+    if (res < 0) {
+        if (errno == EINTR) {
+            return IOS_INTERRUPTED;
+        } else {
+            JNU_ThrowIOExceptionWithLastError(env, "poll failed");
+            return IOS_THROWN;
+        }
+    }
+    return (jint) res;
+}
+