10077 usr/src/uts/ Makefile changes for smatch

*** 8,18 ****
  # source.  A copy of the CDDL is also available via the Internet at
  # http://www.illumos.org/license/CDDL.
  #
  
  #
! # Copyright (c) 2014 Joyent, Inc.  All rights reserved.
  #
  
  #
  #       Path to the base of the uts directory tree (usually /usr/src/uts).
  #
--- 8,18 ----
  # source.  A copy of the CDDL is also available via the Internet at
  # http://www.illumos.org/license/CDDL.
  #
  
  #
! # Copyright (c) 2018, Joyent, Inc.
  #
  
  #
  #       Path to the base of the uts directory tree (usually /usr/src/uts).
  #
*** 47,56 ****
--- 47,59 ----
  CERRWARN        += -_gcc=-Wno-switch
  CERRWARN        += -_gcc=-Wno-unused-variable
  CERRWARN        += -_gcc=-Wno-unused-label
  CERRWARN        += -_gcc=-Wno-unused-function
  
+ # needs work
+ SMOFF += all_func_returns
+ 
  LINTTAGS        += -erroff=E_FUNC_VAR_UNUSED
  LINTTAGS        += -erroff=E_FUNC_ARG_UNUSED
  LINTTAGS        += -erroff=E_STATIC_UNUSED
  LINTTAGS        += -erroff=E_FUNC_SET_NOT_USED
  LINTTAGS        += -erroff=E_FUNC_RET_MAYBE_IGNORED2