writeback: Remove a mux leg on data_in

Initialize to 0 forces the mux to have an extra leg fed with zeros.

Instead initialize data_in to one of the mux inputs

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/writeback.vhdl b/writeback.vhdl
index 042ad599eacd755c34dff44af53722cc4df63f6a..ab7b6c71f8c3b6d17dfa7702e7f2cf1c9883b5e8 100644 (file)
--- a/writeback.vhdl
+++ b/writeback.vhdl
@@ -95,7 +95,7 @@ begin
         partial_write <= '0';
         sign_extend <= '0';
         second_word <= '0';
-        data_in <= (others => '0');
+        data_in <= e_in.write_data;
 
         if e_in.write_enable = '1' then
             w_out.write_reg <= e_in.write_reg;