Btrfs: Misc 2.6.25 updates

Remove the btrfs read_inode method, and use save_mount_options
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/inode.c

@@ -297,7 +297,6 @@ int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
 
 int btrfs_submit_bio_hook(int rw, struct bio *bio)
 {
-	// struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1;
 	struct bio_vec *bvec = bio->bi_io_vec;
 	struct inode *inode = bvec->bv_page->mapping->host;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -320,32 +319,7 @@ int btrfs_submit_bio_hook(int rw, struct bio *bio)
 	mutex_unlock(&root->fs_info->fs_mutex);
 	return ret;
 }
-#if 0
-int btrfs_writepage_io_hook(struct page *page, u64 start, u64 end)
-{
-	struct inode *inode = page->mapping->host;
-	struct btrfs_root *root = BTRFS_I(inode)->root;
-	struct btrfs_trans_handle *trans;
-	char *kaddr;
-	int ret = 0;
-	u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
-	size_t offset = start - page_start;
-	if (btrfs_test_opt(root, NODATASUM) ||
-	    btrfs_test_flag(inode, NODATASUM))
-		return 0;
-	mutex_lock(&root->fs_info->fs_mutex);
-	trans = btrfs_start_transaction(root, 1);
-	btrfs_set_trans_block_group(trans, inode);
-	kaddr = kmap(page);
-	btrfs_csum_file_block(trans, root, inode, inode->i_ino,
-			      start, kaddr + offset, end - start + 1);
-	kunmap(page);
-	ret = btrfs_end_transaction(trans, root);
-	BUG_ON(ret);
-	mutex_unlock(&root->fs_info->fs_mutex);
-	return ret;
-}
-#endif
+
 int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
 {
 	int ret = 0;
@@ -3049,7 +3023,6 @@ static struct file_operations btrfs_dir_file_operations = {
 
 static struct extent_io_ops btrfs_extent_io_ops = {
 	.fill_delalloc = run_delalloc_range,
-	// .writepage_io_hook = btrfs_writepage_io_hook,
 	.submit_bio_hook = btrfs_submit_bio_hook,
 	.readpage_io_hook = btrfs_readpage_io_hook,
 	.readpage_end_io_hook = btrfs_readpage_end_io_hook,

fs/btrfs/super.c

@@ -272,6 +272,11 @@ static int btrfs_fill_super(struct super_block * sb, void * data, int silent)
 
 	sb->s_root = root_dentry;
 	btrfs_transaction_queue_work(tree_root, HZ * 30);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
+	save_mount_options(sb, data);
+#endif
+
 	return 0;
 
 fail_close:
@@ -462,9 +467,13 @@ static struct super_operations btrfs_super_ops = {
 	.delete_inode	= btrfs_delete_inode,
 	.put_inode	= btrfs_put_inode,
 	.put_super	= btrfs_put_super,
-	.read_inode	= btrfs_read_locked_inode,
 	.write_super	= btrfs_write_super,
 	.sync_fs	= btrfs_sync_fs,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+	.read_inode     = btrfs_read_locked_inode,
+#else
+	.show_options	= generic_show_options,
+#endif
 	.write_inode	= btrfs_write_inode,
 	.dirty_inode	= btrfs_dirty_inode,
 	.alloc_inode	= btrfs_alloc_inode,