[PATCH] Swap Migration V5: PF_SWAPWRITE to allow writing to swap

[pandora-kernel.git] / mm / swap_state.c

diff --git a/mm/swap_state.c b/mm/swap_state.c
index 132164f..fc2aecb 100644 (file)
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -14,6 +14,7 @@
 #include <linux/pagemap.h>
 #include <linux/buffer_head.h>
 #include <linux/backing-dev.h>
+#include <linux/pagevec.h>
 
 #include <asm/pgtable.h>
 
@@ -40,7 +41,6 @@ struct address_space swapper_space = {
        .i_mmap_nonlinear = LIST_HEAD_INIT(swapper_space.i_mmap_nonlinear),
        .backing_dev_info = &swap_backing_dev_info,
 };
-EXPORT_SYMBOL(swapper_space);
 
 #define INC_CACHE_INFO(x)      do { swap_cache_info.x++; } while (0)
 
@@ -83,7 +83,7 @@ static int __add_to_swap_cache(struct page *page, swp_entry_t entry,
                        page_cache_get(page);
                        SetPageLocked(page);
                        SetPageSwapCache(page);
-                       page->private = entry.val;
+                       set_page_private(page, entry.val);
                        total_swapcache_pages++;
                        pagecache_acct(1);
                }
@@ -126,8 +126,8 @@ void __delete_from_swap_cache(struct page *page)
        BUG_ON(PageWriteback(page));
        BUG_ON(PagePrivate(page));
 
-       radix_tree_delete(&swapper_space.page_tree, page->private);
-       page->private = 0;
+       radix_tree_delete(&swapper_space.page_tree, page_private(page));
+       set_page_private(page, 0);
        ClearPageSwapCache(page);
        total_swapcache_pages--;
        pagecache_acct(-1);
@@ -197,7 +197,7 @@ void delete_from_swap_cache(struct page *page)
 {
        swp_entry_t entry;
 
-       entry.val = page->private;
+       entry.val = page_private(page);
 
        write_lock_irq(&swapper_space.tree_lock);
        __delete_from_swap_cache(page);
@@ -259,8 +259,7 @@ static inline void free_swap_cache(struct page *page)
 
 /* 
  * Perform a free_page(), also freeing any swap cache associated with
- * this page if it is the last user of the page. Can not do a lock_page,
- * as we are holding the page_table_lock spinlock.
+ * this page if it is the last user of the page.
  */
 void free_page_and_swap_cache(struct page *page)
 {
@@ -274,12 +273,11 @@ void free_page_and_swap_cache(struct page *page)
  */
 void free_pages_and_swap_cache(struct page **pages, int nr)
 {
-       int chunk = 16;
        struct page **pagep = pages;
 
        lru_add_drain();
        while (nr) {
-               int todo = min(chunk, nr);
+               int todo = min(nr, PAGEVEC_SIZE);
                int i;
 
                for (i = 0; i < todo; i++)