Index: include/param.h
===================================================================
RCS file: /cvs/src/sys/arch/amd64/include/param.h,v
retrieving revision 1.23
diff -u -p -r1.23 param.h
--- include/param.h	3 Sep 2016 14:25:27 -0000	1.23
+++ include/param.h	6 Sep 2017 01:35:19 -0000
@@ -68,7 +68,7 @@
 #define	PGSHIFT		PAGE_SHIFT		/* LOG2(PAGE_SIZE) */
 #define	PGOFSET		PAGE_MASK		/* byte offset into page */
 
-#define	UPAGES		5			/* pages of u-area */
+#define	UPAGES		6			/* pages of u-area */
 #define	USPACE		(UPAGES * PAGE_SIZE)	/* total size of u-area */
 #define	USPACE_ALIGN	0			/* u-area alignment 0-none */
 
Index: amd64/vm_machdep.c
===================================================================
RCS file: /cvs/src/sys/arch/amd64/amd64/vm_machdep.c,v
retrieving revision 1.38
diff -u -p -r1.38 vm_machdep.c
--- amd64/vm_machdep.c	18 Aug 2017 16:53:02 -0000	1.38
+++ amd64/vm_machdep.c	6 Sep 2017 01:35:19 -0000
@@ -152,11 +152,9 @@ cpu_exit(struct proc *p)
 void
 setredzone(struct proc *p)
 {
-#if 0
 	pmap_remove(pmap_kernel(), (vaddr_t)p->p_addr + PAGE_SIZE,
 	    (vaddr_t)p->p_addr + 2 * PAGE_SIZE);
 	pmap_update(pmap_kernel());
-#endif
 }
 
 /*