Surpress some warnings

common/src/main/java/io/netty/util/internal/LegacyLinkedTransferQueue.java

@@ -626,6 +626,7 @@ public class LegacyLinkedTransferQueue<E> extends AbstractQueue<E>
      * @return an item if matched, else e
      * @throws NullPointerException if haveData mode but e is null
      */
+    @SuppressWarnings("unchecked")
     private E xfer(E e, boolean haveData, int how, long nanos) {
         if (haveData && e == null) {
             throw new NullPointerException();
@@ -728,6 +729,7 @@ public class LegacyLinkedTransferQueue<E> extends AbstractQueue<E>
      * @param nanos timeout in nanosecs, used only if timed is true
      * @return matched item, or e if unmatched on interrupt or timeout
      */
+    @SuppressWarnings("unchecked")
     private E awaitMatch(Node s, Node pred, E e, boolean timed, long nanos) {
         long lastTime = timed ? System.nanoTime() : 0L;
         Thread w = Thread.currentThread();
@@ -823,6 +825,7 @@ public class LegacyLinkedTransferQueue<E> extends AbstractQueue<E>
      * Returns the item in the first unmatched node with isData; or
      * null if none.  Used by peek.
      */
+    @SuppressWarnings("unchecked")
     private E firstDataItem() {
         for (Node p = head; p != null; p = succ(p)) {
             Object item = p.item;
@@ -874,6 +877,7 @@ public class LegacyLinkedTransferQueue<E> extends AbstractQueue<E>
         /**
          * Moves to next node after prev, or first node if prev null.
          */
+        @SuppressWarnings("unchecked")
         private void advance(Node prev) {
             lastPred = lastRet;
             lastRet = prev;

common/src/main/java/io/netty/util/internal/LinkedTransferQueue.java

@@ -81,6 +81,7 @@ import java.util.concurrent.locks.LockSupport;
 
  * @param <E> the type of elements held in this collection
  */
+@SuppressWarnings("restriction")
 public class LinkedTransferQueue<E> extends AbstractQueue<E>
     implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -3223113410248163686L;
@@ -529,8 +530,6 @@ public class LinkedTransferQueue<E> extends AbstractQueue<E>
             return false;
         }
 
-        private static final long serialVersionUID = -3375979862319811754L;
-
         // Unsafe mechanics
         private static final sun.misc.Unsafe UNSAFE;
         private static final long itemOffset;