X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=mm%2Fswap_state.c;h=35d7e0ee1c77c9fb94915905e171f82ff859b7da;hb=86d12e471d9f152217744f2054e63e3742949879;hp=c8310a37be3abbcf267472f30bd0e3677c1336d4;hpb=c8d0267efdb4ab16cd0ed6e0218e8c164006de48;p=cascardo%2Flinux.git

diff --git a/mm/swap_state.c b/mm/swap_state.c
index c8310a37be3a..35d7e0ee1c77 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -37,6 +37,8 @@ struct address_space swapper_spaces[MAX_SWAPFILES] = {
 		.page_tree	= RADIX_TREE_INIT(GFP_ATOMIC|__GFP_NOWARN),
 		.i_mmap_writable = ATOMIC_INIT(0),
 		.a_ops		= &swap_aops,
+		/* swap cache doesn't use writeback related tags */
+		.flags		= 1 << AS_NO_WRITEBACK_TAGS,
 	}
 };
 
@@ -92,7 +94,7 @@ int __add_to_swap_cache(struct page *page, swp_entry_t entry)
 	address_space = swap_address_space(entry);
 	spin_lock_irq(&address_space->tree_lock);
 	error = radix_tree_insert(&address_space->page_tree,
-					entry.val, page);
+				  swp_offset(entry), page);
 	if (likely(!error)) {
 		address_space->nrpages++;
 		__inc_node_page_state(page, NR_FILE_PAGES);
@@ -143,7 +145,7 @@ void __delete_from_swap_cache(struct page *page)
 
 	entry.val = page_private(page);
 	address_space = swap_address_space(entry);
-	radix_tree_delete(&address_space->page_tree, page_private(page));
+	radix_tree_delete(&address_space->page_tree, swp_offset(entry));
 	set_page_private(page, 0);
 	ClearPageSwapCache(page);
 	address_space->nrpages--;
@@ -252,9 +254,7 @@ static inline void free_swap_cache(struct page *page)
 void free_page_and_swap_cache(struct page *page)
 {
 	free_swap_cache(page);
-	if (is_huge_zero_page(page))
-		put_huge_zero_page();
-	else
+	if (!is_huge_zero_page(page))
 		put_page(page);
 }
 
@@ -283,7 +283,7 @@ struct page * lookup_swap_cache(swp_entry_t entry)
 {
 	struct page *page;
 
-	page = find_get_page(swap_address_space(entry), entry.val);
+	page = find_get_page(swap_address_space(entry), swp_offset(entry));
 
 	if (page) {
 		INC_CACHE_INFO(find_success);
@@ -310,7 +310,7 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
 		 * called after lookup_swap_cache() failed, re-calling
 		 * that would confuse statistics.
 		 */
-		found_page = find_get_page(swapper_space, entry.val);
+		found_page = find_get_page(swapper_space, swp_offset(entry));
 		if (found_page)
 			break;