The pmap function pmap_clear_reference() is no longer used. Remove it.

pmap_clear_reference() has had exactly one caller in the kernel for
several years, more precisely, since FreeBSD 8.  Now, that call no
longer exists.

Approved by:	re (kib)
Sponsored by:	EMC / Isilon Storage Division

4 files changed, 0 insertions, 66 deletions

diff --git a/sys/powerpc/aim/mmu_oea.c b/sys/powerpc/aim/mmu_oea.c
index f4e9d9b..ac3e9fe 100644
--- a/sys/powerpc/aim/mmu_oea.c
+++ b/sys/powerpc/aim/mmu_oea.c
@@ -278,7 +278,6 @@ int		moea_pte_spill(vm_offset_t);
  */
 void moea_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
 void moea_clear_modify(mmu_t, vm_page_t);
-void moea_clear_reference(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,
     vm_page_t *mb, vm_offset_t b_offset, int xfersize);
@@ -328,7 +327,6 @@ 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_clear_reference,	moea_clear_reference),
 	MMUMETHOD(mmu_copy_page,	moea_copy_page),
 	MMUMETHOD(mmu_copy_pages,	moea_copy_pages),
 	MMUMETHOD(mmu_enter,		moea_enter),
@@ -1353,17 +1351,6 @@ moea_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va)
 }
 
 void
-moea_clear_reference(mmu_t mmu, vm_page_t m)
-{
-
-	KASSERT((m->oflags & VPO_UNMANAGED) == 0,
-	    ("moea_clear_reference: page %p is not managed", m));
-	rw_wlock(&pvh_global_lock);
-	moea_clear_bit(m, PTE_REF);
-	rw_wunlock(&pvh_global_lock);
-}
-
-void
 moea_clear_modify(mmu_t mmu, vm_page_t m)
 {
 
diff --git a/sys/powerpc/aim/mmu_oea64.c b/sys/powerpc/aim/mmu_oea64.c
index 3913b47..4ed2606 100644
--- a/sys/powerpc/aim/mmu_oea64.c
+++ b/sys/powerpc/aim/mmu_oea64.c
@@ -288,7 +288,6 @@ static void		moea64_syncicache(mmu_t, pmap_t pmap, vm_offset_t va,
  */
 void moea64_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
 void moea64_clear_modify(mmu_t, vm_page_t);
-void moea64_clear_reference(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,
     vm_page_t *mb, vm_offset_t b_offset, int xfersize);
@@ -334,7 +333,6 @@ static void moea64_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t);
 static mmu_method_t moea64_methods[] = {
 	MMUMETHOD(mmu_change_wiring,	moea64_change_wiring),
 	MMUMETHOD(mmu_clear_modify,	moea64_clear_modify),
-	MMUMETHOD(mmu_clear_reference,	moea64_clear_reference),
 	MMUMETHOD(mmu_copy_page,	moea64_copy_page),
 	MMUMETHOD(mmu_copy_pages,	moea64_copy_pages),
 	MMUMETHOD(mmu_enter,		moea64_enter),
@@ -1543,15 +1541,6 @@ moea64_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va)
 }
 
 void
-moea64_clear_reference(mmu_t mmu, vm_page_t m)
-{
-
-	KASSERT((m->oflags & VPO_UNMANAGED) == 0,
-	    ("moea64_clear_reference: page %p is not managed", m));
-	moea64_clear_bit(mmu, m, LPTE_REF);
-}
-
-void
 moea64_clear_modify(mmu_t mmu, vm_page_t m)
 {
 
diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c
index d5c64ed..7b9a5d3 100644
--- a/sys/powerpc/booke/pmap.c
+++ b/sys/powerpc/booke/pmap.c
@@ -270,7 +270,6 @@ void pmap_bootstrap_ap(volatile uint32_t *);
  */
 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_clear_reference(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);
 static void		mmu_booke_copy_page(mmu_t, vm_page_t, vm_page_t);
@@ -333,7 +332,6 @@ 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_clear_reference,	mmu_booke_clear_reference),
 	MMUMETHOD(mmu_copy,		mmu_booke_copy),
 	MMUMETHOD(mmu_copy_page,	mmu_booke_copy_page),
 	MMUMETHOD(mmu_copy_pages,	mmu_booke_copy_pages),
@@ -2357,38 +2355,6 @@ mmu_booke_ts_referenced(mmu_t mmu, vm_page_t m)
 }
 
 /*
- * Clear the reference bit on the specified physical page.
- */
-static void
-mmu_booke_clear_reference(mmu_t mmu, vm_page_t m)
-{
-	pte_t *pte;
-	pv_entry_t pv;
-
-	KASSERT((m->oflags & VPO_UNMANAGED) == 0,
-	    ("mmu_booke_clear_reference: page %p is not managed", m));
-	rw_wlock(&pvh_global_lock);
-	TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) {
-		PMAP_LOCK(pv->pv_pmap);
-		if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL &&
-		    PTE_ISVALID(pte)) {
-			if (PTE_ISREFERENCED(pte)) {
-				mtx_lock_spin(&tlbivax_mutex);
-				tlb_miss_lock();
-				
-				tlb0_flush_entry(pv->pv_va);
-				pte->flags &= ~PTE_REFERENCED;
-
-				tlb_miss_unlock();
-				mtx_unlock_spin(&tlbivax_mutex);
-			}
-		}
-		PMAP_UNLOCK(pv->pv_pmap);
-	}
-	rw_wunlock(&pvh_global_lock);
-}
-
-/*
  * Change wiring attribute for a map/virtual-address pair.
  */
 static void
diff --git a/sys/powerpc/powerpc/pmap_dispatch.c b/sys/powerpc/powerpc/pmap_dispatch.c
index 24e6076..773ede1 100644
--- a/sys/powerpc/powerpc/pmap_dispatch.c
+++ b/sys/powerpc/powerpc/pmap_dispatch.c
@@ -116,14 +116,6 @@ pmap_clear_modify(vm_page_t m)
 }
 
 void
-pmap_clear_reference(vm_page_t m)
-{
-
-	CTR2(KTR_PMAP, "%s(%p)", __func__, m);
-	MMU_CLEAR_REFERENCE(mmu_obj, m);
-}
-
-void
 pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr,
     vm_size_t len, vm_offset_t src_addr)
 {