10077 usr/src/uts/ Makefile changes for smatch

*** 20,29 ****
--- 20,31 ----
  #
  #
  # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  #
+ # Copyright (c) 2018, Joyent, Inc.
+ #
  # uts/intel/bpf/Makefile
  #
  #
  #       This makefile drives the production of the bpf driver
  #       kernel module.
*** 71,80 ****
--- 73,85 ----
  LINTTAGS        += -erroff=E_PTRDIFF_OVERFLOW -erroff=E_BAD_PTR_CAST_ALIGN
  
  CERRWARN        += -_gcc=-Wno-unused-label
  CERRWARN        += -_gcc=-Wno-uninitialized
  
+ # needs work
+ $(OBJS_DIR)/bpf.o := SMOFF += all_func_returns
+ 
  #
  #       Default build targets.
  #
  .KEEP_STATE: