X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Fbuffer.c;h=5287be18633bc7c2b6621fc20c2f5ce97fa8e561;hb=b9dcbb40f40d60c7e33a2b7ea858fcd27c35cc00;hp=b1667986442f130b9fe523b85f174966100cd09e;hpb=6fbfddcb52d8d9fa2cd209f5ac2a1c87497d55b5;p=linux-2.6-omap-h63xx.git

diff --git a/fs/buffer.c b/fs/buffer.c
index b1667986442..5287be18633 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -96,7 +96,7 @@ static void
 __clear_page_buffers(struct page *page)
 {
 	ClearPagePrivate(page);
-	page->private = 0;
+	set_page_private(page, 0);
 	page_cache_release(page);
 }
 
@@ -396,7 +396,7 @@ asmlinkage long sys_fdatasync(unsigned int fd)
  * private_lock is contended then so is mapping->tree_lock).
  */
 static struct buffer_head *
-__find_get_block_slow(struct block_device *bdev, sector_t block, int unused)
+__find_get_block_slow(struct block_device *bdev, sector_t block)
 {
 	struct inode *bd_inode = bdev->bd_inode;
 	struct address_space *bd_mapping = bd_inode->i_mapping;
@@ -1438,7 +1438,7 @@ __find_get_block(struct block_device *bdev, sector_t block, int size)
 	struct buffer_head *bh = lookup_bh_lru(bdev, block, size);
 
 	if (bh == NULL) {
-		bh = __find_get_block_slow(bdev, block, size);
+		bh = __find_get_block_slow(bdev, block);
 		if (bh)
 			bh_lru_install(bh);
 	}
@@ -1478,8 +1478,10 @@ EXPORT_SYMBOL(__getblk);
 void __breadahead(struct block_device *bdev, sector_t block, int size)
 {
 	struct buffer_head *bh = __getblk(bdev, block, size);
-	ll_rw_block(READA, 1, &bh);
-	brelse(bh);
+	if (likely(bh)) {
+		ll_rw_block(READA, 1, &bh);
+		brelse(bh);
+	}
 }
 EXPORT_SYMBOL(__breadahead);
 
@@ -1497,7 +1499,7 @@ __bread(struct block_device *bdev, sector_t block, int size)
 {
 	struct buffer_head *bh = __getblk(bdev, block, size);
 
-	if (!buffer_uptodate(bh))
+	if (likely(bh) && !buffer_uptodate(bh))
 		bh = __bread_slow(bh);
 	return bh;
 }
@@ -1637,6 +1639,15 @@ out:
 }
 EXPORT_SYMBOL(block_invalidatepage);
 
+int do_invalidatepage(struct page *page, unsigned long offset)
+{
+	int (*invalidatepage)(struct page *, unsigned long);
+	invalidatepage = page->mapping->a_ops->invalidatepage;
+	if (invalidatepage == NULL)
+		invalidatepage = block_invalidatepage;
+	return (*invalidatepage)(page, offset);
+}
+
 /*
  * We attach and possibly dirty the buffers atomically wrt
  * __set_page_dirty_buffers() via private_lock.  try_to_free_buffers
@@ -1694,7 +1705,7 @@ void unmap_underlying_metadata(struct block_device *bdev, sector_t block)
 
 	might_sleep();
 
-	old_bh = __find_get_block_slow(bdev, block, 0);
+	old_bh = __find_get_block_slow(bdev, block);
 	if (old_bh) {
 		clear_buffer_dirty(old_bh);
 		wait_on_buffer(old_bh);
@@ -2696,7 +2707,7 @@ int block_write_full_page(struct page *page, get_block_t *get_block,
 		 * they may have been added in ext3_writepage().  Make them
 		 * freeable here, so the page does not leak.
 		 */
-		block_invalidatepage(page, 0);
+		do_invalidatepage(page, 0);
 		unlock_page(page);
 		return 0; /* don't care */
 	}