1 files changed, 10 insertions, 7 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index 373bb6292bdc..3b6d701073e7 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -18,7 +18,6 @@
  * async buffer flushing, 1999 Andrea Arcangeli <andrea@suse.de>
  */
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/syscalls.h>
 #include <linux/fs.h>
@@ -471,13 +470,18 @@ out:
    pass does the actual I/O. */
 void invalidate_bdev(struct block_device *bdev, int destroy_dirty_buffers)
 {
+        struct address_space *mapping = bdev->bd_inode->i_mapping;
+
+        if (mapping->nrpages == 0)
+                return;
+
         invalidate_bh_lrus();
         /*
          * FIXME: what about destroy_dirty_buffers?
          * We really want to use invalidate_inode_pages2() for
          * that, but not until that's cleaned up.
          */
-        invalidate_inode_pages(bdev->bd_inode->i_mapping);
+        invalidate_inode_pages(mapping);
 }
 
 /*
@@ -564,7 +568,7 @@ still_busy:
  * Completion handler for block_write_full_page() - pages which are unlocked
  * during I/O, and which have PageWriteback cleared upon I/O completion.
  */
-void end_buffer_async_write(struct buffer_head *bh, int uptodate)
+static void end_buffer_async_write(struct buffer_head *bh, int uptodate)
 {
         char b[BDEVNAME_SIZE];
         unsigned long flags;
@@ -852,7 +856,7 @@ int __set_page_dirty_buffers(struct page *page)
                 write_lock_irq(&mapping->tree_lock);
                 if (page->mapping) {    /* Race with truncate? */
                         if (mapping_cap_account_dirty(mapping))
-                                inc_page_state(nr_dirty);
+                                __inc_zone_page_state(page, NR_FILE_DIRTY);
                         radix_tree_tag_set(&mapping->page_tree,
                                                 page_index(page),
                                                 PAGECACHE_TAG_DIRTY);
@@ -2598,7 +2602,7 @@ int nobh_truncate_page(struct address_space *mapping, loff_t from)
         unsigned offset = from & (PAGE_CACHE_SIZE-1);
         unsigned to;
         struct page *page;
-        struct address_space_operations *a_ops = mapping->a_ops;
+        const struct address_space_operations *a_ops = mapping->a_ops;
         char *kaddr;
         int ret = 0;
 
@@ -2983,6 +2987,7 @@ int try_to_free_buffers(struct page *page)
 
         spin_lock(&mapping->private_lock);
         ret = drop_buffers(page, &buffers_to_free);
+        spin_unlock(&mapping->private_lock);
         if (ret) {
                 /*
                  * If the filesystem writes its buffers by hand (eg ext3)
@@ -2994,7 +2999,6 @@ int try_to_free_buffers(struct page *page)
                  */
                 clear_page_dirty(page);
         }
-        spin_unlock(&mapping->private_lock);
 out:
         if (buffers_to_free) {
                 struct buffer_head *bh = buffers_to_free;
@@ -3166,7 +3170,6 @@ EXPORT_SYMBOL(block_sync_page);
 EXPORT_SYMBOL(block_truncate_page);
 EXPORT_SYMBOL(block_write_full_page);
 EXPORT_SYMBOL(cont_prepare_write);
-EXPORT_SYMBOL(end_buffer_async_write);
 EXPORT_SYMBOL(end_buffer_read_sync);
 EXPORT_SYMBOL(end_buffer_write_sync);
 EXPORT_SYMBOL(file_fsync);