Fix three dialyzer warnings in kernel

Joint effort by Kostis, pan, egil & sverker

3 files changed, 20 insertions, 31 deletions

diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl
index 935c2de253..d6dc070436 100644
--- a/erts/preloaded/src/erlang.erl
+++ b/erts/preloaded/src/erlang.erl
@@ -427,17 +427,11 @@ delay_trap(Result, Timeout) -> receive after Timeout -> Result end.
 %% have to reflect that, which we cannot forsee.
 %%
 set_cookie(Node, C) when Node =/= nonode@nohost, is_atom(Node) ->
-    Res = case C of
-	      _ when is_atom(C) ->
-		  auth:set_cookie(Node, C);
-	      {CI,CO} when is_atom(CI), is_atom(CO) ->
-		  auth:set_cookie(Node, {CI, CO});
-	      _ ->
-		  error
-	  end,
-    case Res of
-	error -> exit(badarg);
-	Other -> Other
+    case is_atom(C) of
+	true ->
+	    auth:set_cookie(Node, C);
+	false ->
+	    error(badarg)
     end.
 
 -spec get_cookie() -> atom().
diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl
index 446656e45f..2e4a2866e6 100644
--- a/erts/preloaded/src/prim_inet.erl
+++ b/erts/preloaded/src/prim_inet.erl
@@ -1518,7 +1518,7 @@ enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 4 ->
     [?INET_AF_INET,?int16(Port)|ip4_to_bytes(IP)];
 enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 8 ->
     [?INET_AF_INET6,?int16(Port)|ip6_to_bytes(IP)];
-enc_value_2(ether, [X1,X2,X3,X4,X5,X6]) -> [X1,X2,X3,X4,X5,X6];
+enc_value_2(ether, [_,_,_,_,_,_]=Xs) -> Xs;
 enc_value_2(sockaddr, any) ->
     [?INET_AF_ANY];
 enc_value_2(sockaddr, loopback) ->
@@ -1572,7 +1572,7 @@ dec_value(time, [X3,X2,X1,X0|T]) ->
 	Val -> {Val, T}
     end;
 dec_value(ip, [A,B,C,D|T])             -> {{A,B,C,D}, T};
-dec_value(ether,[X1,X2,X3,X4,X5,X6|T]) -> {[X1,X2,X3,X4,X5,X6],T};
+%% dec_value(ether, [X1,X2,X3,X4,X5,X6|T]) -> {[X1,X2,X3,X4,X5,X6],T};
 dec_value(sockaddr, [X|T]) ->
     get_ip(X, T);
 dec_value(linkaddr, [X1,X0|T]) ->
diff --git a/lib/kernel/src/net_kernel.erl b/lib/kernel/src/net_kernel.erl
index f5e2820bbe..23db85e1f4 100644
--- a/lib/kernel/src/net_kernel.erl
+++ b/lib/kernel/src/net_kernel.erl
@@ -322,24 +322,19 @@ init({Name, LongOrShortNames, TickT}) ->
 	    process_flag(priority, max),
 	    Ticktime = to_integer(TickT),
 	    Ticker = spawn_link(net_kernel, ticker, [self(), Ticktime]),
-	    case auth:get_cookie(Node) of
-		Cookie when is_atom(Cookie) ->
-		    {ok, #state{name = Name,
-				node = Node,
-				type = LongOrShortNames,
-				tick = #tick{ticker = Ticker, time = Ticktime},
-				connecttime = connecttime(),
-				connections =
-				    ets:new(sys_dist,[named_table,
-						      protected,
-						      {keypos, 2}]),
-				listen = Listeners,
-				allowed = [],
-				verbose = 0
-			       }};
-		_ELSE ->
-		    {stop, {error,{bad_cookie, Node}}}
-	    end;
+	    {ok, #state{name = Name,
+			node = Node,
+			type = LongOrShortNames,
+			tick = #tick{ticker = Ticker, time = Ticktime},
+			connecttime = connecttime(),
+			connections =
+			ets:new(sys_dist,[named_table,
+					  protected,
+					  {keypos, 2}]),
+			listen = Listeners,
+			allowed = [],
+			verbose = 0
+		       }};
 	Error ->
 	    {stop, Error}
     end.