10080 smatch Makefile changes for usr/src/cmd

@@ -107,10 +107,12 @@
 CERRWARN += -_gcc=-Wno-clobbered
 CERRWARN += -_gcc=-Wno-parentheses
 CERRWARN += -_gcc=-Wno-unused-label
 CERRWARN += -_gcc=-Wno-unused-variable
 
+SMOFF += all_func_returns
+
 #
 # -erroff=E_INCONS_ARG_DECL2 works around a problem where lint gets confused
 # about how struct mdb_tgt_gregset is used in mdb_tgt_stack_f() and
 # mdb_tgt_stack_iter_f(). Will be resolved as part of fix for CR 6749868.
 #