Retire pmap_change_wiring(). We have never used it to wire virtual pages.

We continue to use pmap_enter() for that.  For unwiring virtual pages, we
now use pmap_unwire(), which unwires a range of virtual addresses instead
of a single virtual page.

Sponsored by:	EMC / Isilon Storage Division

13 files changed, 0 insertions, 401 deletions

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 5696f675c2f4..29b5e8219197 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -4693,58 +4693,6 @@ pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object,
 }
 
 /*
- *	Routine:	pmap_change_wiring
- *	Function:	Change the wiring attribute for a map/virtual-address
- *			pair.
- *	In/out conditions:
- *			The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	pd_entry_t *pde;
-	pt_entry_t *pte;
-	boolean_t pv_lists_locked;
-
-	pv_lists_locked = FALSE;
-
-	/*
-	 * Wiring is not a hardware characteristic so there is no need to
-	 * invalidate TLB.
-	 */
-retry:
-	PMAP_LOCK(pmap);
-	pde = pmap_pde(pmap, va);
-	if ((*pde & PG_PS) != 0) {
-		if (!wired != ((*pde & PG_W) == 0)) {
-			if (!pv_lists_locked) {
-				pv_lists_locked = TRUE;
-				if (!rw_try_rlock(&pvh_global_lock)) {
-					PMAP_UNLOCK(pmap);
-					rw_rlock(&pvh_global_lock);
-					goto retry;
-				}
-			}
-			if (!pmap_demote_pde(pmap, pde, va))
-				panic("pmap_change_wiring: demotion failed");
-		} else
-			goto out;
-	}
-	pte = pmap_pde_to_pte(pde, va);
-	if (wired && (*pte & PG_W) == 0) {
-		pmap->pm_stats.wired_count++;
-		atomic_set_long(pte, PG_W);
-	} else if (!wired && (*pte & PG_W) != 0) {
-		pmap->pm_stats.wired_count--;
-		atomic_clear_long(pte, PG_W);
-	}
-out:
-	if (pv_lists_locked)
-		rw_runlock(&pvh_global_lock);
-	PMAP_UNLOCK(pmap);
-}
-
-/*
  *	Clear the wired attribute from the mappings for the specified range of
  *	addresses in the given pmap.  Every valid mapping within that range
  *	must have the wired attribute set.  In contrast, invalid mappings
diff --git a/sys/arm/arm/pmap-v6.c b/sys/arm/arm/pmap-v6.c
index 0d26f466b0ba..b5ede56f662d 100644
--- a/sys/arm/arm/pmap-v6.c
+++ b/sys/arm/arm/pmap-v6.c
@@ -3253,56 +3253,6 @@ pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot)
 }
 
 /*
- *	Routine:	pmap_change_wiring
- *	Function:	Change the wiring attribute for a map/virtual-address
- *			pair.
- *	In/out conditions:
- *			The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	struct l2_bucket *l2b;
-	struct md_page *pvh;
-	struct pv_entry *pve;
-	pd_entry_t *pl1pd, l1pd;
-	pt_entry_t *ptep, pte;
-	vm_page_t m;
-
-	rw_wlock(&pvh_global_lock);
-	PMAP_LOCK(pmap);
-	pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
-	l1pd = *pl1pd;
-	if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
-		m = PHYS_TO_VM_PAGE(l1pd & L1_S_FRAME);
-		KASSERT((m != NULL) && ((m->oflags & VPO_UNMANAGED) == 0),
-		    ("pmap_change_wiring: unmanaged superpage should not "
-		     "be changed"));
-		KASSERT(pmap != pmap_kernel(),
-		    ("pmap_change_wiring: managed kernel superpage "
-		     "should not exist"));
-		pvh = pa_to_pvh(l1pd & L1_S_FRAME);
-		pve = pmap_find_pv(pvh, pmap, trunc_1mpage(va));
-		if (!wired != ((pve->pv_flags & PVF_WIRED) == 0)) {
-			if (!pmap_demote_section(pmap, va))
-				panic("pmap_change_wiring: demotion failed");
-		} else
-			goto out;
-	}
-	l2b = pmap_get_l2_bucket(pmap, va);
-	KASSERT(l2b, ("No l2b bucket in pmap_change_wiring"));
-	ptep = &l2b->l2b_kva[l2pte_index(va)];
-	pte = *ptep;
-	m = PHYS_TO_VM_PAGE(l2pte_pa(pte));
-	if (m != NULL)
-		pmap_modify_pv(m, pmap, va, PVF_WIRED,
-		    wired == TRUE ? PVF_WIRED : 0);
-out:
-	rw_wunlock(&pvh_global_lock);
-	PMAP_UNLOCK(pmap);
-}
-
-/*
  *	Clear the wired attribute from the mappings for the specified range of
  *	addresses in the given pmap.  Every valid mapping within that range
  *	must have the wired attribute set.  In contrast, invalid mappings
diff --git a/sys/arm/arm/pmap.c b/sys/arm/arm/pmap.c
index 8244b67a4261..fa1c8f10cdaf 100644
--- a/sys/arm/arm/pmap.c
+++ b/sys/arm/arm/pmap.c
@@ -3544,33 +3544,6 @@ pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot)
 }
 
 /*
- *	Routine:	pmap_change_wiring
- *	Function:	Change the wiring attribute for a map/virtual-address
- *			pair.
- *	In/out conditions:
- *			The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	struct l2_bucket *l2b;
-	pt_entry_t *ptep, pte;
-	vm_page_t pg;
-
-	rw_wlock(&pvh_global_lock);
- 	PMAP_LOCK(pmap);
-	l2b = pmap_get_l2_bucket(pmap, va);
-	KASSERT(l2b, ("No l2b bucket in pmap_change_wiring"));
-	ptep = &l2b->l2b_kva[l2pte_index(va)];
-	pte = *ptep;
-	pg = PHYS_TO_VM_PAGE(l2pte_pa(pte));
-	if (pg)
-		pmap_modify_pv(pg, pmap, va, PVF_WIRED, wired ? PVF_WIRED : 0);
-	rw_wunlock(&pvh_global_lock);
- 	PMAP_UNLOCK(pmap);
-}
-
-/*
  *	Clear the wired attribute from the mappings for the specified range of
  *	addresses in the given pmap.  Every valid mapping within that range
  *	must have the wired attribute set.  In contrast, invalid mappings
diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
index d0c74b50ab6f..8c21b0d30f75 100644
--- a/sys/i386/i386/pmap.c
+++ b/sys/i386/i386/pmap.c
@@ -3968,58 +3968,6 @@ pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object,
 }
 
 /*
- *	Routine:	pmap_change_wiring
- *	Function:	Change the wiring attribute for a map/virtual-address
- *			pair.
- *	In/out conditions:
- *			The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	pd_entry_t *pde;
-	pt_entry_t *pte;
-	boolean_t are_queues_locked;
-
-	are_queues_locked = FALSE;
-retry:
-	PMAP_LOCK(pmap);
-	pde = pmap_pde(pmap, va);
-	if ((*pde & PG_PS) != 0) {
-		if (!wired != ((*pde & PG_W) == 0)) {
-			if (!are_queues_locked) {
-				are_queues_locked = TRUE;
-				if (!rw_try_wlock(&pvh_global_lock)) {
-					PMAP_UNLOCK(pmap);
-					rw_wlock(&pvh_global_lock);
-					goto retry;
-				}
-			}
-			if (!pmap_demote_pde(pmap, pde, va))
-				panic("pmap_change_wiring: demotion failed");
-		} else
-			goto out;
-	}
-	pte = pmap_pte(pmap, va);
-
-	if (wired && !pmap_pte_w(pte))
-		pmap->pm_stats.wired_count++;
-	else if (!wired && pmap_pte_w(pte))
-		pmap->pm_stats.wired_count--;
-
-	/*
-	 * Wiring is not a hardware characteristic so there is no need to
-	 * invalidate TLB.
-	 */
-	pmap_pte_set_w(pte, wired);
-	pmap_pte_release(pte);
-out:
-	if (are_queues_locked)
-		rw_wunlock(&pvh_global_lock);
-	PMAP_UNLOCK(pmap);
-}
-
-/*
  *	Clear the wired attribute from the mappings for the specified range of
  *	addresses in the given pmap.  Every valid mapping within that range
  *	must have the wired attribute set.  In contrast, invalid mappings
diff --git a/sys/i386/xen/pmap.c b/sys/i386/xen/pmap.c
index 54ee3a6793bb..fbfdcf7a5cce 100644
--- a/sys/i386/xen/pmap.c
+++ b/sys/i386/xen/pmap.c
@@ -3167,39 +3167,6 @@ pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object,
 }
 
 /*
- *	Routine:	pmap_change_wiring
- *	Function:	Change the wiring attribute for a map/virtual-address
- *			pair.
- *	In/out conditions:
- *			The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	pt_entry_t *pte;
-
-	rw_wlock(&pvh_global_lock);
-	PMAP_LOCK(pmap);
-	pte = pmap_pte(pmap, va);
-
-	if (wired && !pmap_pte_w(pte)) {
-		PT_SET_VA_MA((pte), *(pte) | PG_W, TRUE);
-		pmap->pm_stats.wired_count++;
-	} else if (!wired && pmap_pte_w(pte)) {
-		PT_SET_VA_MA((pte), *(pte) & ~PG_W, TRUE);
-		pmap->pm_stats.wired_count--;
-	}
-	
-	/*
-	 * Wiring is not a hardware characteristic so there is no need to
-	 * invalidate TLB.
-	 */
-	pmap_pte_release(pte);
-	PMAP_UNLOCK(pmap);
-	rw_wunlock(&pvh_global_lock);
-}
-
-/*
  *	Clear the wired attribute from the mappings for the specified range of
  *	addresses in the given pmap.  Every valid mapping within that range
  *	must have the wired attribute set.  In contrast, invalid mappings
diff --git a/sys/mips/mips/pmap.c b/sys/mips/mips/pmap.c
index 5e766b2adcf3..bd8bbbb98899 100644
--- a/sys/mips/mips/pmap.c
+++ b/sys/mips/mips/pmap.c
@@ -2425,37 +2425,6 @@ pmap_object_init_pt(pmap_t pmap, vm_offset_t addr,
 }
 
 /*
- *	Routine:	pmap_change_wiring
- *	Function:	Change the wiring attribute for a map/virtual-address
- *			pair.
- *	In/out conditions:
- *			The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	pt_entry_t *pte;
-
-	PMAP_LOCK(pmap);
-	pte = pmap_pte(pmap, va);
-
-	if (wired && !pte_test(pte, PTE_W))
-		pmap->pm_stats.wired_count++;
-	else if (!wired && pte_test(pte, PTE_W))
-		pmap->pm_stats.wired_count--;
-
-	/*
-	 * Wiring is not a hardware characteristic so there is no need to
-	 * invalidate TLB.
-	 */
-	if (wired)
-		pte_set(pte, PTE_W);
-	else
-		pte_clear(pte, PTE_W);
-	PMAP_UNLOCK(pmap);
-}
-
-/*
  *	Clear the wired attribute from the mappings for the specified range of
  *	addresses in the given pmap.  Every valid mapping within that range
  *	must have the wired attribute set.  In contrast, invalid mappings
diff --git a/sys/powerpc/aim/mmu_oea.c b/sys/powerpc/aim/mmu_oea.c
index 0113c653ae08..068c9286fc77 100644
--- a/sys/powerpc/aim/mmu_oea.c
+++ b/sys/powerpc/aim/mmu_oea.c
@@ -269,7 +269,6 @@ int		moea_pte_spill(vm_offset_t);
 /*
  * Kernel MMU interface
  */
-void moea_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
 void moea_clear_modify(mmu_t, vm_page_t);
 void moea_copy_page(mmu_t, vm_page_t, vm_page_t);
 void moea_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
@@ -319,7 +318,6 @@ vm_offset_t moea_dumpsys_map(mmu_t mmu, struct pmap_md *md, vm_size_t ofs,
 struct pmap_md * moea_scan_md(mmu_t mmu, struct pmap_md *prev);
 
 static mmu_method_t moea_methods[] = {
-	MMUMETHOD(mmu_change_wiring,	moea_change_wiring),
 	MMUMETHOD(mmu_clear_modify,	moea_clear_modify),
 	MMUMETHOD(mmu_copy_page,	moea_copy_page),
 	MMUMETHOD(mmu_copy_pages,	moea_copy_pages),
@@ -1016,28 +1014,6 @@ moea_deactivate(mmu_t mmu, struct thread *td)
 }
 
 void
-moea_change_wiring(mmu_t mmu, pmap_t pm, vm_offset_t va, boolean_t wired)
-{
-	struct	pvo_entry *pvo;
-
-	PMAP_LOCK(pm);
-	pvo = moea_pvo_find_va(pm, va & ~ADDR_POFF, NULL);
-
-	if (pvo != NULL) {
-		if (wired) {
-			if ((pvo->pvo_vaddr & PVO_WIRED) == 0)
-				pm->pm_stats.wired_count++;
-			pvo->pvo_vaddr |= PVO_WIRED;
-		} else {
-			if ((pvo->pvo_vaddr & PVO_WIRED) != 0)
-				pm->pm_stats.wired_count--;
-			pvo->pvo_vaddr &= ~PVO_WIRED;
-		}
-	}
-	PMAP_UNLOCK(pm);
-}
-
-void
 moea_unwire(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva)
 {
 	struct	pvo_entry key, *pvo;
diff --git a/sys/powerpc/aim/mmu_oea64.c b/sys/powerpc/aim/mmu_oea64.c
index 00664affdd64..3b71e3c3f063 100644
--- a/sys/powerpc/aim/mmu_oea64.c
+++ b/sys/powerpc/aim/mmu_oea64.c
@@ -283,7 +283,6 @@ static void		moea64_syncicache(mmu_t, pmap_t pmap, vm_offset_t va,
 /*
  * Kernel MMU interface
  */
-void moea64_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
 void moea64_clear_modify(mmu_t, vm_page_t);
 void moea64_copy_page(mmu_t, vm_page_t, vm_page_t);
 void moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
@@ -332,7 +331,6 @@ vm_offset_t moea64_dumpsys_map(mmu_t mmu, struct pmap_md *md, vm_size_t ofs,
 struct pmap_md * moea64_scan_md(mmu_t mmu, struct pmap_md *prev);
 
 static mmu_method_t moea64_methods[] = {
-	MMUMETHOD(mmu_change_wiring,	moea64_change_wiring),
 	MMUMETHOD(mmu_clear_modify,	moea64_clear_modify),
 	MMUMETHOD(mmu_copy_page,	moea64_copy_page),
 	MMUMETHOD(mmu_copy_pages,	moea64_copy_pages),
@@ -1026,59 +1024,6 @@ moea64_deactivate(mmu_t mmu, struct thread *td)
 }
 
 void
-moea64_change_wiring(mmu_t mmu, pmap_t pm, vm_offset_t va, boolean_t wired)
-{
-	struct	pvo_entry *pvo;
-	uintptr_t pt;
-	uint64_t vsid;
-	int	i, ptegidx;
-
-	LOCK_TABLE_WR();
-	PMAP_LOCK(pm);
-	pvo = moea64_pvo_find_va(pm, va & ~ADDR_POFF);
-
-	if (pvo != NULL) {
-		pt = MOEA64_PVO_TO_PTE(mmu, pvo);
-
-		if (wired) {
-			if ((pvo->pvo_vaddr & PVO_WIRED) == 0)
-				pm->pm_stats.wired_count++;
-			pvo->pvo_vaddr |= PVO_WIRED;
-			pvo->pvo_pte.lpte.pte_hi |= LPTE_WIRED;
-		} else {
-			if ((pvo->pvo_vaddr & PVO_WIRED) != 0)
-				pm->pm_stats.wired_count--;
-			pvo->pvo_vaddr &= ~PVO_WIRED;
-			pvo->pvo_pte.lpte.pte_hi &= ~LPTE_WIRED;
-		}
-
-		if (pt != -1) {
-			/* Update wiring flag in page table. */
-			MOEA64_PTE_CHANGE(mmu, pt, &pvo->pvo_pte.lpte,
-			    pvo->pvo_vpn);
-		} else if (wired) {
-			/*
-			 * If we are wiring the page, and it wasn't in the
-			 * page table before, add it.
-			 */
-			vsid = PVO_VSID(pvo);
-			ptegidx = va_to_pteg(vsid, PVO_VADDR(pvo),
-			    pvo->pvo_vaddr & PVO_LARGE);
-
-			i = MOEA64_PTE_INSERT(mmu, ptegidx, &pvo->pvo_pte.lpte);
-			
-			if (i >= 0) {
-				PVO_PTEGIDX_CLR(pvo);
-				PVO_PTEGIDX_SET(pvo, i);
-			}
-		}
-			
-	}
-	UNLOCK_TABLE_WR();
-	PMAP_UNLOCK(pm);
-}
-
-void
 moea64_unwire(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva)
 {
 	struct	pvo_entry key, *pvo;
diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c
index d640d90ed04b..f28711aad00a 100644
--- a/sys/powerpc/booke/pmap.c
+++ b/sys/powerpc/booke/pmap.c
@@ -266,7 +266,6 @@ void pmap_bootstrap_ap(volatile uint32_t *);
 /*
  * Kernel MMU interface
  */
-static void		mmu_booke_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
 static void		mmu_booke_clear_modify(mmu_t, vm_page_t);
 static void		mmu_booke_copy(mmu_t, pmap_t, pmap_t, vm_offset_t,
     vm_size_t, vm_offset_t);
@@ -331,7 +330,6 @@ static struct pmap_md	*mmu_booke_scan_md(mmu_t, struct pmap_md *);
 
 static mmu_method_t mmu_booke_methods[] = {
 	/* pmap dispatcher interface */
-	MMUMETHOD(mmu_change_wiring,	mmu_booke_change_wiring),
 	MMUMETHOD(mmu_clear_modify,	mmu_booke_clear_modify),
 	MMUMETHOD(mmu_copy,		mmu_booke_copy),
 	MMUMETHOD(mmu_copy_page,	mmu_booke_copy_page),
@@ -2412,31 +2410,6 @@ mmu_booke_ts_referenced(mmu_t mmu, vm_page_t m)
 }
 
 /*
- * Change wiring attribute for a map/virtual-address pair.
- */
-static void
-mmu_booke_change_wiring(mmu_t mmu, pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-	pte_t *pte;
-
-	PMAP_LOCK(pmap);
-	if ((pte = pte_find(mmu, pmap, va)) != NULL) {
-		if (wired) {
-			if (!PTE_ISWIRED(pte)) {
-				pte->flags |= PTE_WIRED;
-				pmap->pm_stats.wired_count++;
-			}
-		} else {
-			if (PTE_ISWIRED(pte)) {
-				pte->flags &= ~PTE_WIRED;
-				pmap->pm_stats.wired_count--;
-			}
-		}
-	}
-	PMAP_UNLOCK(pmap);
-}
-
-/*
  * Clear the wired attribute from the mappings for the specified range of
  * addresses in the given pmap.  Every valid mapping within that range must
  * have the wired attribute set.  In contrast, invalid mappings cannot have
diff --git a/sys/powerpc/powerpc/mmu_if.m b/sys/powerpc/powerpc/mmu_if.m
index 8ef69d12a847..7577f9382501 100644
--- a/sys/powerpc/powerpc/mmu_if.m
+++ b/sys/powerpc/powerpc/mmu_if.m
@@ -152,22 +152,6 @@ METHOD void advise {
 
 
 /**
- * @brief Change the wiring attribute for the page in the given physical
- * map and virtual address.
- *
- * @param _pmap		physical map of page
- * @param _va		page virtual address
- * @param _wired	TRUE to increment wired count, FALSE to decrement
- */
-METHOD void change_wiring {
-	mmu_t		_mmu;
-	pmap_t		_pmap;
-	vm_offset_t	_va;
-	boolean_t	_wired;
-};
-
-
-/**
  * @brief Clear the 'modified' bit on the given physical page
  *
  * @param _pg		physical page
diff --git a/sys/powerpc/powerpc/pmap_dispatch.c b/sys/powerpc/powerpc/pmap_dispatch.c
index bc58b1147238..cd4cca9667d6 100644
--- a/sys/powerpc/powerpc/pmap_dispatch.c
+++ b/sys/powerpc/powerpc/pmap_dispatch.c
@@ -100,14 +100,6 @@ pmap_advise(pmap_t pmap, vm_offset_t start, vm_offset_t end, int advice)
 }
 
 void
-pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
-{
-
-	CTR4(KTR_PMAP, "%s(%p, %#x, %u)", __func__, pmap, va, wired);
-	MMU_CHANGE_WIRING(mmu_obj, pmap, va, wired);
-}
-
-void
 pmap_clear_modify(vm_page_t m)
 {
 
diff --git a/sys/sparc64/sparc64/pmap.c b/sys/sparc64/sparc64/pmap.c
index af49fbdf0591..e5f961237a10 100644
--- a/sys/sparc64/sparc64/pmap.c
+++ b/sys/sparc64/sparc64/pmap.c
@@ -1666,31 +1666,6 @@ pmap_object_init_pt(pmap_t pm, vm_offset_t addr, vm_object_t object,
 	    ("pmap_object_init_pt: non-device object"));
 }
 
-/*
- * Change the wiring attribute for a map/virtual-address pair.
- * The mapping must already exist in the pmap.
- */
-void
-pmap_change_wiring(pmap_t pm, vm_offset_t va, boolean_t wired)
-{
-	struct tte *tp;
-	u_long data;
-
-	PMAP_LOCK(pm);
-	if ((tp = tsb_tte_lookup(pm, va)) != NULL) {
-		if (wired) {
-			data = atomic_set_long(&tp->tte_data, TD_WIRED);
-			if ((data & TD_WIRED) == 0)
-				pm->pm_stats.wired_count++;
-		} else {
-			data = atomic_clear_long(&tp->tte_data, TD_WIRED);
-			if ((data & TD_WIRED) != 0)
-				pm->pm_stats.wired_count--;
-		}
-	}
-	PMAP_UNLOCK(pm);
-}
-
 static int
 pmap_unwire_tte(pmap_t pm, pmap_t pm2, struct tte *tp, vm_offset_t va)
 {
diff --git a/sys/vm/pmap.h b/sys/vm/pmap.h
index 7c9d8c117944..1f2a017eadc4 100644
--- a/sys/vm/pmap.h
+++ b/sys/vm/pmap.h
@@ -102,7 +102,6 @@ void		 pmap_advise(pmap_t pmap, vm_offset_t sva, vm_offset_t eva,
 		    int advice);
 void		 pmap_align_superpage(vm_object_t, vm_ooffset_t, vm_offset_t *,
 		    vm_size_t);
-void		 pmap_change_wiring(pmap_t, vm_offset_t, boolean_t);
 void		 pmap_clear_modify(vm_page_t m);
 void		 pmap_copy(pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t);
 void		 pmap_copy_page(vm_page_t, vm_page_t);