10077 usr/src/uts/ Makefile changes for smatch

*** 20,29 ****
--- 20,30 ----
  #
  #
  # Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  #
  #       This makefile drives the production of the i8042 nexus driver
  #
  #       intel implementation architecture dependent
*** 62,71 ****
--- 63,75 ----
  LINTTAGS        += -erroff=E_BAD_PTR_CAST_ALIGN
  LINTTAGS        += -erroff=E_STATIC_UNUSED
  
  CERRWARN        += -_gcc=-Wno-unused-function
  
+ # needs work
+ $(OBJS_DIR)/i8042.o := SMOFF += all_func_returns
+ 
  #
  #       Default build targets.
  #
  .KEEP_STATE: