[PATCH] can_share_swap_page: use page_mapcount
[linux-2.6.git] / mm / memory.c
index 1c0a3db..da91b7b 100644 (file)
@@ -1686,10 +1686,6 @@ static int do_swap_page(struct mm_struct * mm,
        }
 
        /* The page isn't present yet, go ahead with the fault. */
-               
-       swap_free(entry);
-       if (vm_swap_full())
-               remove_exclusive_swap_page(page);
 
        inc_mm_counter(mm, rss);
        pte = mk_pte(page, vma->vm_page_prot);
@@ -1697,12 +1693,16 @@ static int do_swap_page(struct mm_struct * mm,
                pte = maybe_mkwrite(pte_mkdirty(pte), vma);
                write_access = 0;
        }
-       unlock_page(page);
 
        flush_icache_page(vma, page);
        set_pte_at(mm, address, page_table, pte);
        page_add_anon_rmap(page, vma, address);
 
+       swap_free(entry);
+       if (vm_swap_full())
+               remove_exclusive_swap_page(page);
+       unlock_page(page);
+
        if (write_access) {
                if (do_wp_page(mm, vma, address,
                                page_table, pmd, pte) == VM_FAULT_OOM)