o Use vm_map_wire() and vm_map_unwire() in place of vm_map_pageable() and

   vm_map_user_pageable().
 o Remove vm_map_pageable() and vm_map_user_pageable().
 o Remove vm_map_clear_recursive() and vm_map_set_recursive().  (They were
   only used by vm_map_pageable() and vm_map_user_pageable().)

Reviewed by:	tegge

1 files changed, 0 insertions, 397 deletions

diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
index fadf7cc..85b88b4 100644
--- a/sys/vm/vm_map.c
+++ b/sys/vm/vm_map.c
@@ -413,16 +413,6 @@ _vm_map_lock_downgrade(vm_map_t map, const char *file, int line)
 		("%s: lock not held", __func__));
 }
 
-void
-_vm_map_set_recursive(vm_map_t map, const char *file, int line)
-{
-}
-
-void
-_vm_map_clear_recursive(vm_map_t map, const char *file, int line)
-{
-}
-
 /*
  *	vm_map_unlock_and_wait:
  */
@@ -1803,393 +1793,6 @@ done:
 }
 
 /*
- * Implement the semantics of mlock
- */
-int
-vm_map_user_pageable(
-	vm_map_t map,
-	vm_offset_t start,
-	vm_offset_t end,
-	boolean_t new_pageable)
-{
-	vm_map_entry_t entry;
-	vm_map_entry_t start_entry;
-	vm_offset_t estart;
-	vm_offset_t eend;
-	int rv;
-
-	vm_map_lock(map);
-	VM_MAP_RANGE_CHECK(map, start, end);
-
-	if (vm_map_lookup_entry(map, start, &start_entry) == FALSE) {
-		vm_map_unlock(map);
-		return (KERN_INVALID_ADDRESS);
-	}
-
-	if (new_pageable) {
-
-		entry = start_entry;
-		vm_map_clip_start(map, entry, start);
-
-		/*
-		 * Now decrement the wiring count for each region. If a region
-		 * becomes completely unwired, unwire its physical pages and
-		 * mappings.
-		 */
-		while ((entry != &map->header) && (entry->start < end)) {
-			if (entry->eflags & MAP_ENTRY_USER_WIRED) {
-				vm_map_clip_end(map, entry, end);
-				entry->eflags &= ~MAP_ENTRY_USER_WIRED;
-				entry->wired_count--;
-				if (entry->wired_count == 0)
-					vm_fault_unwire(map, entry->start, entry->end);
-			}
-			vm_map_simplify_entry(map,entry);
-			entry = entry->next;
-		}
-	} else {
-
-		entry = start_entry;
-
-		while ((entry != &map->header) && (entry->start < end)) {
-
-			if (entry->eflags & MAP_ENTRY_USER_WIRED) {
-				entry = entry->next;
-				continue;
-			}
-			
-			if (entry->wired_count != 0) {
-				entry->wired_count++;
-				entry->eflags |= MAP_ENTRY_USER_WIRED;
-				entry = entry->next;
-				continue;
-			}
-
-			/* Here on entry being newly wired */
-
-			if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) == 0) {
-				int copyflag = entry->eflags & MAP_ENTRY_NEEDS_COPY;
-				if (copyflag && ((entry->protection & VM_PROT_WRITE) != 0)) {
-
-					vm_object_shadow(&entry->object.vm_object,
-					    &entry->offset,
-					    atop(entry->end - entry->start));
-					entry->eflags &= ~MAP_ENTRY_NEEDS_COPY;
-
-				} else if (entry->object.vm_object == NULL &&
-					   !map->system_map) {
-
-					entry->object.vm_object =
-					    vm_object_allocate(OBJT_DEFAULT,
-						atop(entry->end - entry->start));
-					entry->offset = (vm_offset_t) 0;
-
-				}
-			}
-
-			vm_map_clip_start(map, entry, start);
-			vm_map_clip_end(map, entry, end);
-
-			entry->wired_count++;
-			entry->eflags |= MAP_ENTRY_USER_WIRED;
-			estart = entry->start;
-			eend = entry->end;
-
-			/* First we need to allow map modifications */
-			vm_map_set_recursive(map);
-			vm_map_lock_downgrade(map);
-			map->timestamp++;
-
-			rv = vm_fault_user_wire(map, entry->start, entry->end);
-			if (rv) {
-
-				entry->wired_count--;
-				entry->eflags &= ~MAP_ENTRY_USER_WIRED;
-
-				vm_map_clear_recursive(map);
-				vm_map_unlock(map);
-			
-				/*
-				 * At this point, the map is unlocked, and
-				 * entry might no longer be valid.  Use copy
-				 * of entry start value obtained while entry
-				 * was valid.
-				 */
-				(void) vm_map_user_pageable(map, start, estart,
-							    TRUE);
-				return rv;
-			}
-
-			vm_map_clear_recursive(map);
-			if (vm_map_lock_upgrade(map)) {
-				vm_map_lock(map);
-				if (vm_map_lookup_entry(map, estart, &entry) 
-				    == FALSE) {
-					vm_map_unlock(map);
-					/* 
-					 * vm_fault_user_wire succeded, thus
-					 * the area between start and eend
-					 * is wired and has to be unwired
-					 * here as part of the cleanup.
-					 */
-					(void) vm_map_user_pageable(map,
-								    start,
-								    eend,
-								    TRUE);
-					return (KERN_INVALID_ADDRESS);
-				}
-			}
-			vm_map_simplify_entry(map,entry);
-		}
-	}
-	map->timestamp++;
-	vm_map_unlock(map);
-	return KERN_SUCCESS;
-}
-
-/*
- *	vm_map_pageable:
- *
- *	Sets the pageability of the specified address
- *	range in the target map.  Regions specified
- *	as not pageable require locked-down physical
- *	memory and physical page maps.
- *
- *	The map must not be locked, but a reference
- *	must remain to the map throughout the call.
- */
-int
-vm_map_pageable(
-	vm_map_t map,
-	vm_offset_t start,
-	vm_offset_t end,
-	boolean_t new_pageable)
-{
-	vm_map_entry_t entry;
-	vm_map_entry_t start_entry;
-	vm_offset_t failed = 0;
-	int rv;
-
-	GIANT_REQUIRED;
-
-	vm_map_lock(map);
-
-	VM_MAP_RANGE_CHECK(map, start, end);
-
-	/*
-	 * Only one pageability change may take place at one time, since
-	 * vm_fault assumes it will be called only once for each
-	 * wiring/unwiring.  Therefore, we have to make sure we're actually
-	 * changing the pageability for the entire region.  We do so before
-	 * making any changes.
-	 */
-	if (vm_map_lookup_entry(map, start, &start_entry) == FALSE) {
-		vm_map_unlock(map);
-		return (KERN_INVALID_ADDRESS);
-	}
-	entry = start_entry;
-
-	/*
-	 * Actions are rather different for wiring and unwiring, so we have
-	 * two separate cases.
-	 */
-	if (new_pageable) {
-		vm_map_clip_start(map, entry, start);
-
-		/*
-		 * Unwiring.  First ensure that the range to be unwired is
-		 * really wired down and that there are no holes.
-		 */
-		while ((entry != &map->header) && (entry->start < end)) {
-			if (entry->wired_count == 0 ||
-			    (entry->end < end &&
-				(entry->next == &map->header ||
-				    entry->next->start > entry->end))) {
-				vm_map_unlock(map);
-				return (KERN_INVALID_ARGUMENT);
-			}
-			entry = entry->next;
-		}
-
-		/*
-		 * Now decrement the wiring count for each region. If a region
-		 * becomes completely unwired, unwire its physical pages and
-		 * mappings.
-		 */
-		entry = start_entry;
-		while ((entry != &map->header) && (entry->start < end)) {
-			vm_map_clip_end(map, entry, end);
-
-			entry->wired_count--;
-			if (entry->wired_count == 0)
-				vm_fault_unwire(map, entry->start, entry->end);
-
-			vm_map_simplify_entry(map, entry);
-
-			entry = entry->next;
-		}
-	} else {
-		/*
-		 * Wiring.  We must do this in two passes:
-		 *
-		 * 1.  Holding the write lock, we create any shadow or zero-fill
-		 * objects that need to be created. Then we clip each map
-		 * entry to the region to be wired and increment its wiring
-		 * count.  We create objects before clipping the map entries
-		 * to avoid object proliferation.
-		 *
-		 * 2.  We downgrade to a read lock, and call vm_fault_wire to
-		 * fault in the pages for any newly wired area (wired_count is
-		 * 1).
-		 *
-		 * Downgrading to a read lock for vm_fault_wire avoids a possible
-		 * deadlock with another process that may have faulted on one
-		 * of the pages to be wired (it would mark the page busy,
-		 * blocking us, then in turn block on the map lock that we
-		 * hold).  Because of problems in the recursive lock package,
-		 * we cannot upgrade to a write lock in vm_map_lookup.  Thus,
-		 * any actions that require the write lock must be done
-		 * beforehand.  Because we keep the read lock on the map, the
-		 * copy-on-write status of the entries we modify here cannot
-		 * change.
-		 */
-
-		/*
-		 * Pass 1.
-		 */
-		while ((entry != &map->header) && (entry->start < end)) {
-			if (entry->wired_count == 0) {
-
-				/*
-				 * Perform actions of vm_map_lookup that need
-				 * the write lock on the map: create a shadow
-				 * object for a copy-on-write region, or an
-				 * object for a zero-fill region.
-				 *
-				 * We don't have to do this for entries that
-				 * point to sub maps, because we won't
-				 * hold the lock on the sub map.
-				 */
-				if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) == 0) {
-					int copyflag = entry->eflags & MAP_ENTRY_NEEDS_COPY;
-					if (copyflag &&
-					    ((entry->protection & VM_PROT_WRITE) != 0)) {
-
-						vm_object_shadow(&entry->object.vm_object,
-						    &entry->offset,
-						    atop(entry->end - entry->start));
-						entry->eflags &= ~MAP_ENTRY_NEEDS_COPY;
-					} else if (entry->object.vm_object == NULL &&
-						   !map->system_map) {
-						entry->object.vm_object =
-						    vm_object_allocate(OBJT_DEFAULT,
-							atop(entry->end - entry->start));
-						entry->offset = (vm_offset_t) 0;
-					}
-				}
-			}
-			vm_map_clip_start(map, entry, start);
-			vm_map_clip_end(map, entry, end);
-			entry->wired_count++;
-
-			/*
-			 * Check for holes
-			 */
-			if (entry->end < end &&
-			    (entry->next == &map->header ||
-				entry->next->start > entry->end)) {
-				/*
-				 * Found one.  Object creation actions do not
-				 * need to be undone, but the wired counts
-				 * need to be restored.
-				 */
-				while (entry != &map->header && entry->end > start) {
-					entry->wired_count--;
-					entry = entry->prev;
-				}
-				vm_map_unlock(map);
-				return (KERN_INVALID_ARGUMENT);
-			}
-			entry = entry->next;
-		}
-
-		/*
-		 * Pass 2.
-		 */
-
-		/*
-		 * HACK HACK HACK HACK
-		 *
-		 * If we are wiring in the kernel map or a submap of it,
-		 * unlock the map to avoid deadlocks.  We trust that the
-		 * kernel is well-behaved, and therefore will not do
-		 * anything destructive to this region of the map while
-		 * we have it unlocked.  We cannot trust user processes
-		 * to do the same.
-		 *
-		 * HACK HACK HACK HACK
-		 */
-		if (vm_map_pmap(map) == kernel_pmap) {
-			vm_map_unlock(map);	/* trust me ... */
-		} else {
-			vm_map_lock_downgrade(map);
-		}
-
-		rv = 0;
-		entry = start_entry;
-		while (entry != &map->header && entry->start < end) {
-			/*
-			 * If vm_fault_wire fails for any page we need to undo
-			 * what has been done.  We decrement the wiring count
-			 * for those pages which have not yet been wired (now)
-			 * and unwire those that have (later).
-			 *
-			 * XXX this violates the locking protocol on the map,
-			 * needs to be fixed.
-			 */
-			if (rv)
-				entry->wired_count--;
-			else if (entry->wired_count == 1) {
-				rv = vm_fault_wire(map, entry->start, entry->end);
-				if (rv) {
-					failed = entry->start;
-					entry->wired_count--;
-				}
-			}
-			entry = entry->next;
-		}
-
-		if (vm_map_pmap(map) == kernel_pmap) {
-			vm_map_lock(map);
-		}
-		if (rv) {
-			vm_map_unlock(map);
-			(void) vm_map_pageable(map, start, failed, TRUE);
-			return (rv);
-		}
-		/*
-		 * An exclusive lock on the map is needed in order to call
-		 * vm_map_simplify_entry().  If the current lock on the map
-		 * is only a shared lock, an upgrade is needed.
-		 */
-		if (vm_map_pmap(map) != kernel_pmap &&
-		    vm_map_lock_upgrade(map)) {
-			vm_map_lock(map);
-			if (vm_map_lookup_entry(map, start, &start_entry) ==
-			    FALSE) {
-				vm_map_unlock(map);
-				return KERN_SUCCESS;
-			}
-		}
-		vm_map_simplify_entry(map, start_entry);
-	}
-
-	vm_map_unlock(map);
-
-	return (KERN_SUCCESS);
-}
-
-/*
  * vm_map_clean
  *
  * Push any dirty cached pages in the address range to their pager.