X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=fs%2Fbuffer.c;h=3b6d701073e7f09a311f10297a58d8c06e715df5;hb=8454aeef6fea944ced757ff8e761b59eb3ee960f;hp=373bb6292bdc137a606296c7864093470d41b00f;hpb=2a2ed2db353d949c06b6ef8b6913f65b39111eab;p=~andy%2Flinux

diff --git a/fs/buffer.c b/fs/buffer.c
index 373bb6292bd..3b6d701073e 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);