10077 usr/src/uts/ Makefile changes for smatch

*** 19,28 ****
--- 19,29 ----
  # CDDL HEADER END
  #
  
  #
  # Copyright (c) 2012 Nexenta Systems, Inc. All rights reserved.
+ # Copyright (c) 2018, Joyent, Inc.
  #
  
  #
  #       Path to the base of the uts directory tree (usually /usr/src/uts).
  #
*** 57,66 ****
--- 58,70 ----
  #
  # lint pass one enforcement
  #
  CFLAGS += $(CCVERBOSE)
  
+ # needs work
+ SMOFF += all_func_returns
+ 
  #
  #       Default build targets.
  #
  .KEEP_STATE: