Author: alc
Date: Fri Sep 20 04:30:18 2013
New Revision: 255724
URL: http://svnweb.freebsd.org/changeset/base/255724
Log:
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
Modified:
head/sys/amd64/amd64/pmap.c
head/sys/arm/arm/pmap-v6.c
head/sys/arm/arm/pmap.c
head/sys/i386/i386/pmap.c
head/sys/i386/xen/pmap.c
head/sys/ia64/ia64/pmap.c
head/sys/mips/mips/pmap.c
head/sys/powerpc/aim/mmu_oea.c
head/sys/powerpc/aim/mmu_oea64.c
head/sys/powerpc/booke/pmap.c
head/sys/powerpc/powerpc/pmap_dispatch.c
head/sys/sparc64/sparc64/pmap.c
head/sys/vm/pmap.h
Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/amd64/amd64/pmap.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -5382,66 +5382,6 @@ small_mappings:
}
/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
- struct md_page *pvh;
- pmap_t pmap;
- pv_entry_t next_pv, pv;
- pd_entry_t oldpde, *pde;
- pt_entry_t *pte;
- vm_offset_t va;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- if ((m->flags & PG_FICTITIOUS) != 0)
- goto small_mappings;
- pvh = pa_to_pvh(VM_PAGE_TO_PHYS(m));
- TAILQ_FOREACH_SAFE(pv, &pvh->pv_list, pv_next, next_pv) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- va = pv->pv_va;
- pde = pmap_pde(pmap, va);
- oldpde = *pde;
- if ((oldpde & PG_A) != 0) {
- if (pmap_demote_pde(pmap, pde, va)) {
- /*
- * Remove the mapping to a single page so
- * that a subsequent access may repromote.
- * Since the underlying page table page is
- * fully populated, this removal never frees
- * a page table page.
- */
- va += VM_PAGE_TO_PHYS(m) - (oldpde &
- PG_PS_FRAME);
- pmap_remove_page(pmap, va, pde, NULL);
- }
- }
- PMAP_UNLOCK(pmap);
- }
-small_mappings:
- TAILQ_FOREACH(pv, &m->md.pv_list, pv_next) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pde = pmap_pde(pmap, pv->pv_va);
- KASSERT((*pde & PG_PS) == 0, ("pmap_clear_reference: found"
- " a 2mpage in page %p's pv list", m));
- pte = pmap_pde_to_pte(pde, pv->pv_va);
- if (*pte & PG_A) {
- atomic_clear_long(pte, PG_A);
- pmap_invalidate_page(pmap, pv->pv_va);
- }
- PMAP_UNLOCK(pmap);
- }
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
* Miscellaneous support routines follow
*/
Modified: head/sys/arm/arm/pmap-v6.c
==============================================================================
--- head/sys/arm/arm/pmap-v6.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/arm/arm/pmap-v6.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -4905,22 +4905,6 @@ pmap_clear_modify(vm_page_t m)
/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- if (pmap_is_referenced(m))
- pmap_clearbit(m, PVF_REF);
-}
-
-
-/*
* Clear the write and modified bits in each of the given page's mappings.
*/
void
Modified: head/sys/arm/arm/pmap.c
==============================================================================
--- head/sys/arm/arm/pmap.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/arm/arm/pmap.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -4591,21 +4591,6 @@ pmap_is_referenced(vm_page_t m)
return ((m->md.pvh_attrs & PVF_REF) != 0);
}
-/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- if (m->md.pvh_attrs & PVF_REF)
- pmap_clearbit(m, PVF_REF);
-}
-
/*
* Clear the write and modified bits in each of the given page's mappings.
Modified: head/sys/i386/i386/pmap.c
==============================================================================
--- head/sys/i386/i386/pmap.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/i386/i386/pmap.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -5049,73 +5049,6 @@ small_mappings:
}
/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
- struct md_page *pvh;
- pv_entry_t next_pv, pv;
- pmap_t pmap;
- pd_entry_t oldpde, *pde;
- pt_entry_t *pte;
- vm_offset_t va;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- sched_pin();
- if ((m->flags & PG_FICTITIOUS) != 0)
- goto small_mappings;
- pvh = pa_to_pvh(VM_PAGE_TO_PHYS(m));
- TAILQ_FOREACH_SAFE(pv, &pvh->pv_list, pv_next, next_pv) {
- va = pv->pv_va;
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pde = pmap_pde(pmap, va);
- oldpde = *pde;
- if ((oldpde & PG_A) != 0) {
- if (pmap_demote_pde(pmap, pde, va)) {
- /*
- * Remove the mapping to a single page so
- * that a subsequent access may repromote.
- * Since the underlying page table page is
- * fully populated, this removal never frees
- * a page table page.
- */
- va += VM_PAGE_TO_PHYS(m) - (oldpde &
- PG_PS_FRAME);
- pmap_remove_page(pmap, va, NULL);
- }
- }
- PMAP_UNLOCK(pmap);
- }
-small_mappings:
- TAILQ_FOREACH(pv, &m->md.pv_list, pv_next) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pde = pmap_pde(pmap, pv->pv_va);
- KASSERT((*pde & PG_PS) == 0, ("pmap_clear_reference: found"
- " a 4mpage in page %p's pv list", m));
- pte = pmap_pte_quick(pmap, pv->pv_va);
- if ((*pte & PG_A) != 0) {
- /*
- * Regardless of whether a pte is 32 or 64 bits
- * in size, PG_A is among the least significant
- * 32 bits.
- */
- atomic_clear_int((u_int *)pte, PG_A);
- pmap_invalidate_page(pmap, pv->pv_va);
- }
- PMAP_UNLOCK(pmap);
- }
- sched_unpin();
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
* Miscellaneous support routines follow
*/
Modified: head/sys/i386/xen/pmap.c
==============================================================================
--- head/sys/i386/xen/pmap.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/i386/xen/pmap.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -4024,41 +4024,6 @@ pmap_clear_modify(vm_page_t m)
}
/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
- pv_entry_t pv;
- pmap_t pmap;
- pt_entry_t *pte;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- sched_pin();
- TAILQ_FOREACH(pv, &m->md.pv_list, pv_next) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pte = pmap_pte_quick(pmap, pv->pv_va);
- if ((*pte & PG_A) != 0) {
- /*
- * Regardless of whether a pte is 32 or 64 bits
- * in size, PG_A is among the least significant
- * 32 bits.
- */
- PT_SET_VA_MA(pte, *pte & ~PG_A, FALSE);
- pmap_invalidate_page(pmap, pv->pv_va);
- }
- PMAP_UNLOCK(pmap);
- }
- sched_unpin();
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
* Miscellaneous support routines follow
*/
Modified: head/sys/ia64/ia64/pmap.c
==============================================================================
--- head/sys/ia64/ia64/pmap.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/ia64/ia64/pmap.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -2394,37 +2394,6 @@ pmap_clear_modify(vm_page_t m)
}
/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
- struct ia64_lpte *pte;
- pmap_t oldpmap, pmap;
- pv_entry_t pv;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- oldpmap = pmap_switch(pmap);
- pte = pmap_find_vhpt(pv->pv_va);
- KASSERT(pte != NULL, ("pte"));
- if (pmap_accessed(pte)) {
- pmap_clear_accessed(pte);
- pmap_invalidate_page(pv->pv_va);
- }
- pmap_switch(oldpmap);
- PMAP_UNLOCK(pmap);
- }
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
* Clear the write and modified bits in each of the given page's mappings.
*/
void
Modified: head/sys/mips/mips/pmap.c
==============================================================================
--- head/sys/mips/mips/pmap.c Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/mips/mips/pmap.c Fri Sep 20 04:30:18 2013 (r255724)
@@ -3053,24 +3053,6 @@ pmap_is_referenced(vm_page_t m)
}
/*
- * pmap_clear_reference:
- *
- * Clear the reference bit on the specified physical page.
- */
-void
-pmap_clear_reference(vm_page_t m)
-{
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- if (m->md.pv_flags & PV_TABLE_REF) {
- m->md.pv_flags &= ~PV_TABLE_REF;
- }
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
* Miscellaneous support routines follow
*/
Modified: head/sys/powerpc/aim/mmu_oea.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea.c Fri Sep 20 01:55:37 2013
(r255723)
+++ head/sys/powerpc/aim/mmu_oea.c Fri Sep 20 04:30:18 2013
(r255724)
@@ -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,
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 p
}
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)
{
Modified: head/sys/powerpc/aim/mmu_oea64.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea64.c Fri Sep 20 01:55:37 2013
(r255723)
+++ head/sys/powerpc/aim/mmu_oea64.c Fri Sep 20 04:30:18 2013
(r255724)
@@ -288,7 +288,6 @@ static void moea64_syncicache(mmu_t, pm
*/
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, pm
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
}
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)
{
Modified: head/sys/powerpc/booke/pmap.c
==============================================================================
--- head/sys/powerpc/booke/pmap.c Fri Sep 20 01:55:37 2013
(r255723)
+++ head/sys/powerpc/booke/pmap.c Fri Sep 20 04:30:18 2013
(r255724)
@@ -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_pa
}
/*
- * 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
Modified: head/sys/powerpc/powerpc/pmap_dispatch.c
==============================================================================
--- head/sys/powerpc/powerpc/pmap_dispatch.c Fri Sep 20 01:55:37 2013
(r255723)
+++ head/sys/powerpc/powerpc/pmap_dispatch.c Fri Sep 20 04:30:18 2013
(r255724)
@@ -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)
{
Modified: head/sys/sparc64/sparc64/pmap.c
==============================================================================
--- head/sys/sparc64/sparc64/pmap.c Fri Sep 20 01:55:37 2013
(r255723)
+++ head/sys/sparc64/sparc64/pmap.c Fri Sep 20 04:30:18 2013
(r255724)
@@ -2165,25 +2165,6 @@ pmap_clear_modify(vm_page_t m)
}
void
-pmap_clear_reference(vm_page_t m)
-{
- struct tte *tp;
- u_long data;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_reference: page %p is not managed", m));
- rw_wlock(&tte_list_global_lock);
- TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) {
- if ((tp->tte_data & TD_PV) == 0)
- continue;
- data = atomic_clear_long(&tp->tte_data, TD_REF);
- if ((data & TD_REF) != 0)
- tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp));
- }
- rw_wunlock(&tte_list_global_lock);
-}
-
-void
pmap_remove_write(vm_page_t m)
{
struct tte *tp;
Modified: head/sys/vm/pmap.h
==============================================================================
--- head/sys/vm/pmap.h Fri Sep 20 01:55:37 2013 (r255723)
+++ head/sys/vm/pmap.h Fri Sep 20 04:30:18 2013 (r255724)
@@ -104,7 +104,6 @@ void pmap_align_superpage(vm_object_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_clear_reference(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);
void pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset,
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