Merge to Fedora kernel-2.6.18-1.2255_FC5-vs2.0.2.2-rc9 patched with stable patch...

[linux-2.6.git] / mm / fremap.c

diff --git a/mm/fremap.c b/mm/fremap.c
index 653b56f..f7b6e22 100644 (file)
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -34,9 +34,8 @@ static int zap_pte(struct mm_struct *mm, struct vm_area_struct *vma,
                if (page) {
                        if (pte_dirty(pte))
                                set_page_dirty(page);
-                       page_remove_rmap(page);
+                       page_remove_rmap(page, vma);
                        page_cache_release(page);
-                       // dec_mm_counter(mm, file_rss);
                }
        } else {
                if (!pte_file(pte))
@@ -85,10 +84,11 @@ int install_page(struct mm_struct *mm, struct vm_area_struct *vma,
                inc_mm_counter(mm, file_rss);
 
        flush_icache_page(vma, page);
-       set_pte_at(mm, addr, pte, mk_pte(page, prot));
+       pte_val = mk_pte(page, prot);
+       set_pte_at(mm, addr, pte, pte_val);
        page_add_file_rmap(page);
-       pte_val = *pte;
        update_mmu_cache(vma, addr, pte_val);
+       lazy_mmu_prot_update(pte_val);
        err = 0;
 unlock:
        pte_unmap_unlock(pte, ptl);
@@ -120,7 +120,13 @@ int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma,
 
        set_pte_at(mm, addr, pte, pgoff_to_pte(pgoff));
        pte_val = *pte;
-       update_mmu_cache(vma, addr, pte_val);
+       /*
+        * We don't need to run update_mmu_cache() here because the "file pte"
+        * being installed by install_file_pte() is not a real pte - it's a
+        * non-present entry (like a swap entry), noting what file offset should
+        * be mapped there when there's a fault (in a non-linear vma where
+        * that's not obvious).
+        */
        pte_unmap_unlock(pte, ptl);
        err = 0;
 out: