Index: fopsmapper/Makefile
===================================================================
RCS file: /cvsroot/src/sys/modules/examples/fopsmapper/Makefile,v
retrieving revision 1.1
diff -u -r1.1 Makefile
--- fopsmapper/Makefile	1 Apr 2020 01:57:20 -0000	1.1
+++ fopsmapper/Makefile	1 Apr 2020 14:24:34 -0000
@@ -3,4 +3,6 @@
 KMOD= fopsmapper
 SRCS= fopsmapper.c
 
+WARNS=	3 # Avoid -Werror=sign-compare
+
 .include <bsd.kmodule.mk>
Index: fopsmapper/fopsmapper.c
===================================================================
RCS file: /cvsroot/src/sys/modules/examples/fopsmapper/fopsmapper.c,v
retrieving revision 1.2
diff -u -r1.2 fopsmapper.c
--- fopsmapper/fopsmapper.c	1 Apr 2020 11:45:53 -0000	1.2
+++ fopsmapper/fopsmapper.c	1 Apr 2020 14:24:34 -0000
@@ -115,7 +115,7 @@
 	if (prot & PROT_EXEC)
 		return EACCES;
 
-	if (size != (size_t)PAGE_SIZE)
+	if (size != PAGE_SIZE)
 		return EINVAL;
 
 	if ((fo = fp->f_data) == NULL)