* All mapped pages that are not wired (ie. locked) now have a vm_page_mapping object

that points to both, the page and the area the page is in. This will allow a page
  scanner to steal unused pages when necessary.
* The locking is currently done with a spinlock which we might want to have another
  look at one day.
* dump_page() and dump_area_struct() now dump the page mappings as well.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20356 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/vm.h

@@ -62,6 +62,7 @@ status_t vm_create_vnode_cache(void *vnode, vm_cache_ref **_cacheRef);
 vm_area *vm_area_lookup(vm_address_space *addressSpace, addr_t address);
 status_t vm_set_area_memory_type(area_id id, addr_t physicalBase, uint32 type);
 status_t vm_get_page_mapping(team_id team, addr_t vaddr, addr_t *paddr);
+void vm_remove_all_page_mappings(vm_page *page);
 status_t vm_unmap_pages(vm_area *area, addr_t base, size_t length);
 status_t vm_map_page(vm_area *area, vm_page *page, addr_t address,
 			uint32 protection);

headers/private/kernel/vm_types.h

@@ -61,8 +61,8 @@ class DoublyLinkedAreaLink {
 typedef class DoublyLinkedQueue<vm_page_mapping, DoublyLinkedPageLink> vm_page_mappings;
 typedef class DoublyLinkedQueue<vm_page_mapping, DoublyLinkedAreaLink> vm_area_mappings;
 #else	// !__cplusplus
-typedef void *vm_page_mappings;
-typedef void *vm_area_mappings;
+typedef struct vm_page_mapping *vm_page_mappings;
+typedef struct vm_page_mapping *vm_area_mappings;
 #endif
 
 // vm page