X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=mm%2Ffremap.c;h=4e3f53dd5fd448d20a23296dfb398dd1d281fee0;hb=ded1504dfa0083661fdd1a0a5f021cb7313ffe04;hp=9f381e58bf4471faf6ba14bad1d93a118f12ffbc;hpb=97f2aab6698f3ab2552c41c1024a65ffd0763a6d;p=powerpc.git

diff --git a/mm/fremap.c b/mm/fremap.c
index 9f381e58bf..4e3f53dd5f 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -33,13 +33,13 @@ 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);
 		}
 	} else {
 		if (!pte_file(pte))
 			free_swap_and_cache(pte_to_swp_entry(pte));
-		pte_clear(mm, addr, ptep);
+		pte_clear_not_present_full(mm, addr, ptep, 0);
 	}
 	return !!page;
 }
@@ -79,10 +79,11 @@ 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);
@@ -100,7 +101,6 @@ int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma,
 {
 	int err = -ENOMEM;
 	pte_t *pte;
-	pte_t pte_val;
 	spinlock_t *ptl;
 
 	pte = get_locked_pte(mm, addr, &ptl);
@@ -113,8 +113,13 @@ 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: