Index: sys/i386/i386/pmap.c
===================================================================
--- sys/i386/i386/pmap.c
+++ sys/i386/i386/pmap.c
@@ -216,9 +216,6 @@
     atomic_clear_int((u_int *)(pte), PG_W))
 #define pmap_pte_set_prot(pte, v) ((*(int *)pte &= ~PG_PROT), (*(int *)pte |= (v)))
 
-_Static_assert(sizeof(struct pmap) <= sizeof(struct pmap_KBI),
-    "pmap_KBI");
-
 static int pgeflag = 0;		/* PG_G or-in */
 static int pseflag = 0;		/* PG_PS or-in */
 
Index: sys/i386/i386/pmap_nopae.c
===================================================================
--- sys/i386/i386/pmap_nopae.c
+++ sys/i386/i386/pmap_nopae.c
@@ -42,7 +42,7 @@
 #include <vm/vm.h>
 #include <vm/vm_param.h>
 #define	PMTYPE	pmap_nopae_
+#define	pm_pdir	pm_pdir_nopae
 #include <machine/pmap_nopae.h>
 #include <vm/pmap.h>
-_Static_assert(sizeof(struct pmap_KBI) >= sizeof(struct pmap), "pmap KBI");
 #include "pmap.c"
Index: sys/i386/i386/pmap_pae.c
===================================================================
--- sys/i386/i386/pmap_pae.c
+++ sys/i386/i386/pmap_pae.c
@@ -43,7 +43,8 @@
 #include <vm/vm.h>
 #include <vm/vm_param.h>
 #define	PMTYPE	pmap_pae_
+#define	pm_pdir	pm_pdir_pae
+#define	pm_pdpt	pm_pdpt_pae
 #include <machine/pmap_pae.h>
 #include <vm/pmap.h>
-_Static_assert(sizeof(struct pmap_KBI) >= sizeof(struct pmap), "pmap KBI");
 #include "pmap.c"
Index: sys/i386/include/pmap.h
===================================================================
--- sys/i386/include/pmap.h
+++ sys/i386/include/pmap.h
@@ -166,30 +166,18 @@
 	int			pat_mode;
 };
 
-#define	PMAP_EXTERN_FIELDS						\
-	cpuset_t		pm_active;	/* active on cpus */	\
-	struct mtx		pm_mtx;					\
-	struct pmap_statistics	pm_stats;	/* pmap statistics */
-
-struct pmap_KBI {
-	PMAP_EXTERN_FIELDS
-	int32_t			pm_fill[32];
-};
-
-#ifdef PMTYPE
 struct pmap {
-	PMAP_EXTERN_FIELDS
-	pd_entry_t		*pm_pdir;	/* KVA of page directory */
+	cpuset_t		pm_active;	/* active on cpus */
+	struct mtx		pm_mtx;
+	struct pmap_statistics	pm_stats;	/* pmap statistics */
+	uint32_t		*pm_pdir_nopae;	/* KVA of page directory */
+	uint64_t		*pm_pdir_pae;
 	TAILQ_HEAD(,pv_chunk)	pm_pvchunk;	/* list of mappings in pmap */
 	LIST_ENTRY(pmap) 	pm_list;	/* List of all pmaps */
-	pdpt_entry_t		*pm_pdpt;	/* KVA of page directory pointer
-						   table */
+	uint64_t		*pm_pdpt_pae;
 	struct vm_radix		pm_root;	/* spare page table pages */
-	vm_page_t		pm_ptdpg[NPGPTD];
+	vm_page_t		pm_ptdpg[4];	/* PAE NPGPTD */
 };
-#else
-#define	pmap	pmap_KBI
-#endif
 
 typedef struct pmap	*pmap_t;