--- lum-pristine/arch/um/kernel/mem.c	Mon Aug 12 11:05:20 2002
+++ lum/arch/um/kernel/mem.c	Thu Aug  1 18:07:35 2002
@@ -527,6 +527,22 @@
 	return(phys_mem_map(pte_val(pte)));
 }
 
+struct page *check_get_page(unsigned long kaddr)
+{
+        struct page *page;
+        struct mem_region *mr;
+        unsigned long phys = __pa(kaddr);
+	unsigned int n = phys_region_index(phys);
+
+	if(regions[n] == NULL) 
+                return NULL; 
+
+        mr = regions[n];
+        page = (struct page *) mr->mem_map;
+	return page + ((phys_addr(phys)) >> PAGE_SHIFT);
+}
+
+
 struct mem_region *page_region(struct page *page, int *index_out)
 {
 	int i;
@@ -542,12 +558,14 @@
 			return(region);
 		}
 	}
-	panic("No region found for page");
+//panic("No region found for page");
 	return(NULL);
 }
 
 struct page *page_mem_map(struct page *page)
 {
+        if (!page_region(page, NULL))
+            return NULL; 
 	return((struct page *) page_region(page, NULL)->mem_map);
 }
 
@@ -564,7 +582,7 @@
 		   (addr <= region->start + region->len))
 			return(mk_phys(addr - region->start, i));
 	}
-	panic("region_pa : no region for virtual address");
+	//panic("region_pa : no region for virtual address");
 	return(0);
 }