Fix three dialyzer warnings in kernel

Joint effort by Kostis, pan, egil & sverker

2 files changed, 7 insertions, 13 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]) ->