- Kill the pv_flags member of the alpha mdpage since it stop being used

in rev 1.61 of pmap.c.
- Now that pmap_page_is_free() is empty and since it is just a hack for
  the Alpha pmap, remove it.

sys/alpha/alpha/pmap.c

@@ -633,7 +633,6 @@ pmap_init(phys_start, phys_end)
 		m = &vm_page_array[i];
 		TAILQ_INIT(&m->md.pv_list);
 		m->md.pv_list_count = 0;
-		m->md.pv_flags = 0;
  	}
 
 	/*
@@ -2901,19 +2900,6 @@ pmap_clear_modify(vm_page_t m)
 	}
 }
 
-/*
- *	pmap_page_is_free:
- *
- *	Called when a page is freed to allow pmap to clean up
- *	any extra state associated with the page.  In this case
- *	clear modified/referenced bits.
- */
-void
-pmap_page_is_free(vm_page_t m)
-{
-	m->md.pv_flags = 0;
-}
-
 /*
  *	pmap_clear_reference:
  *

sys/alpha/include/pmap.h

@@ -161,7 +161,6 @@ struct	pv_entry;
 
 struct md_page {
 	int pv_list_count;
-	int			pv_flags;
 	TAILQ_HEAD(,pv_entry)	pv_list;
 };
 

sys/vm/pmap.h

@@ -96,9 +96,6 @@ extern vm_offset_t kernel_vm_end;
 
 extern	int	 pmap_pagedaemon_waken;
 
-#ifdef __alpha__
-void		 pmap_page_is_free(vm_page_t m);
-#endif
 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);

sys/vm/vm_page.c

@@ -1098,10 +1098,6 @@ vm_page_free_toq(vm_page_t m)
 	 */
 	if (m->flags & PG_UNMANAGED) {
 		m->flags &= ~PG_UNMANAGED;
-	} else {
-#ifdef __alpha__
-		pmap_page_is_free(m);
-#endif
 	}
 
 	if (m->hold_count != 0) {