net: implement a SO_DOMAIN getsockoption

[safe/jmp/linux-2.6] / mm / truncate.c

diff --git a/mm/truncate.c b/mm/truncate.c
index 6650c1d..ccc3ecf 100644 (file)
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2002, Linus Torvalds
  *
- * 10Sep2002   akpm@zip.com.au
+ * 10Sep2002   Andrew Morton
  *             Initial version.
  */
 
@@ -18,6 +18,7 @@
 #include <linux/task_io_accounting_ops.h>
 #include <linux/buffer_head.h> /* grr. try_to_release_page,
                                   do_invalidatepage */
+#include "internal.h"
 
 
 /**
@@ -49,7 +50,7 @@ void do_invalidatepage(struct page *page, unsigned long offset)
 static inline void truncate_partial_page(struct page *page, unsigned partial)
 {
        zero_user_segment(page, partial, PAGE_CACHE_SIZE);
-       if (PagePrivate(page))
+       if (page_has_private(page))
                do_invalidatepage(page, partial);
 }
 
@@ -98,11 +99,12 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
        if (page->mapping != mapping)
                return;
 
-       if (PagePrivate(page))
+       if (page_has_private(page))
                do_invalidatepage(page, 0);
 
        cancel_dirty_page(page, PAGE_CACHE_SIZE);
 
+       clear_page_mlock(page);
        remove_from_page_cache(page);
        ClearPageMappedToDisk(page);
        page_cache_release(page);       /* pagecache ref */
@@ -124,9 +126,10 @@ invalidate_complete_page(struct address_space *mapping, struct page *page)
        if (page->mapping != mapping)
                return 0;
 
-       if (PagePrivate(page) && !try_to_release_page(page, 0))
+       if (page_has_private(page) && !try_to_release_page(page, 0))
                return 0;
 
+       clear_page_mlock(page);
        ret = remove_mapping(mapping, page);
 
        return ret;
@@ -264,8 +267,21 @@ void truncate_inode_pages(struct address_space *mapping, loff_t lstart)
 }
 EXPORT_SYMBOL(truncate_inode_pages);
 
-unsigned long __invalidate_mapping_pages(struct address_space *mapping,
-                               pgoff_t start, pgoff_t end, bool be_atomic)
+/**
+ * invalidate_mapping_pages - Invalidate all the unlocked pages of one inode
+ * @mapping: the address_space which holds the pages to invalidate
+ * @start: the offset 'from' which to invalidate
+ * @end: the offset 'to' which to invalidate (inclusive)
+ *
+ * This function only removes the unlocked pages, if you want to
+ * remove all the pages of one inode, you must call truncate_inode_pages.
+ *
+ * invalidate_mapping_pages() will not block on IO activity. It will not
+ * invalidate pages which are dirty, locked, under writeback or mapped into
+ * pagetables.
+ */
+unsigned long invalidate_mapping_pages(struct address_space *mapping,
+                                      pgoff_t start, pgoff_t end)
 {
        struct pagevec pvec;
        pgoff_t next = start;
@@ -306,30 +322,10 @@ unlock:
                                break;
                }
                pagevec_release(&pvec);
-               if (likely(!be_atomic))
-                       cond_resched();
+               cond_resched();
        }
        return ret;
 }
-
-/**
- * invalidate_mapping_pages - Invalidate all the unlocked pages of one inode
- * @mapping: the address_space which holds the pages to invalidate
- * @start: the offset 'from' which to invalidate
- * @end: the offset 'to' which to invalidate (inclusive)
- *
- * This function only removes the unlocked pages, if you want to
- * remove all the pages of one inode, you must call truncate_inode_pages.
- *
- * invalidate_mapping_pages() will not block on IO activity. It will not
- * invalidate pages which are dirty, locked, under writeback or mapped into
- * pagetables.
- */
-unsigned long invalidate_mapping_pages(struct address_space *mapping,
-                               pgoff_t start, pgoff_t end)
-{
-       return __invalidate_mapping_pages(mapping, start, end, false);
-}
 EXPORT_SYMBOL(invalidate_mapping_pages);
 
 /*
@@ -345,16 +341,18 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
        if (page->mapping != mapping)
                return 0;
 
-       if (PagePrivate(page) && !try_to_release_page(page, GFP_KERNEL))
+       if (page_has_private(page) && !try_to_release_page(page, GFP_KERNEL))
                return 0;
 
        spin_lock_irq(&mapping->tree_lock);
        if (PageDirty(page))
                goto failed;
 
-       BUG_ON(PagePrivate(page));
+       clear_page_mlock(page);
+       BUG_ON(page_has_private(page));
        __remove_from_page_cache(page);
        spin_unlock_irq(&mapping->tree_lock);
+       mem_cgroup_uncharge_cache_page(page);
        page_cache_release(page);       /* pagecache ref */
        return 1;
 failed: