10080 smatch Makefile changes for usr/src/cmd

@@ -20,11 +20,11 @@
 #
 #
 # Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
 # Copyright 2017 RackTop Systems.
-#
+# Copyright (c) 2018, Joyent, Inc.
 
 PROG= ztest
 OBJS= $(PROG).o
 SRCS= $(OBJS:%.o=../%.c)
 

@@ -55,10 +55,13 @@
 LINTFLAGS += -erroff=E_STATIC_UNUSED
 LINTFLAGS64 += -erroff=E_STATIC_UNUSED
 
 CERRWARN += -_gcc=-Wno-switch
 
+# false positive
+SMOFF += signed
+
 .KEEP_STATE:
 
 all: $(PROG)
 
 $(PROG): $(OBJS)