KVM: IRQ ACK notifier should be used with in-kernel irqchip
[linux-2.6.git] / mm / truncate.c
index 894e9a7..1229211 100644 (file)
@@ -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"
 
 
 /**
@@ -103,6 +104,7 @@ truncate_complete_page(struct address_space *mapping, struct page *page)
 
        cancel_dirty_page(page, PAGE_CACHE_SIZE);
 
+       clear_page_mlock(page);
        remove_from_page_cache(page);
        ClearPageMappedToDisk(page);
        page_cache_release(page);       /* pagecache ref */
@@ -127,6 +129,7 @@ invalidate_complete_page(struct address_space *mapping, struct page *page)
        if (PagePrivate(page) && !try_to_release_page(page, 0))
                return 0;
 
+       clear_page_mlock(page);
        ret = remove_mapping(mapping, page);
 
        return ret;
@@ -187,7 +190,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
                        if (page_index > next)
                                next = page_index;
                        next++;
-                       if (TestSetPageLocked(page))
+                       if (!trylock_page(page))
                                continue;
                        if (PageWriteback(page)) {
                                unlock_page(page);
@@ -280,7 +283,7 @@ unsigned long __invalidate_mapping_pages(struct address_space *mapping,
                        pgoff_t index;
                        int lock_failed;
 
-                       lock_failed = TestSetPageLocked(page);
+                       lock_failed = !trylock_page(page);
 
                        /*
                         * We really shouldn't be looking at the ->index of an
@@ -352,6 +355,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
        if (PageDirty(page))
                goto failed;
 
+       clear_page_mlock(page);
        BUG_ON(PagePrivate(page));
        __remove_from_page_cache(page);
        spin_unlock_irq(&mapping->tree_lock);
@@ -380,7 +384,7 @@ static int do_launder_page(struct address_space *mapping, struct page *page)
  * Any pages which are found to be mapped into pagetables are unmapped prior to
  * invalidation.
  *
- * Returns -EIO if any pages could not be invalidated.
+ * Returns -EBUSY if any pages could not be invalidated.
  */
 int invalidate_inode_pages2_range(struct address_space *mapping,
                                  pgoff_t start, pgoff_t end)
@@ -440,7 +444,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
                        ret2 = do_launder_page(mapping, page);
                        if (ret2 == 0) {
                                if (!invalidate_complete_page2(mapping, page))
-                                       ret2 = -EIO;
+                                       ret2 = -EBUSY;
                        }
                        if (ret2 < 0)
                                ret = ret2;