Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 892951a9 authored by Josef Bacik's avatar Josef Bacik Committed by Chris Mason
Browse files

Btrfs: remove unused write cache pages hook



The btree inode has it's own write cache pages so we can remove this write
cache pages hook as it's not used.  Thanks,

Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
parent b5bae261
Loading
Loading
Loading
Loading
+0 −47
Original line number Diff line number Diff line
@@ -3347,52 +3347,6 @@ int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
	return btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
}

int btree_lock_page_hook(struct page *page, void *data,
				void (*flush_fn)(void *))
{
	struct inode *inode = page->mapping->host;
	struct btrfs_root *root = BTRFS_I(inode)->root;
	struct extent_buffer *eb;

	/*
	 * We culled this eb but the page is still hanging out on the mapping,
	 * carry on.
	 */
	if (!PagePrivate(page))
		goto out;

	eb = (struct extent_buffer *)page->private;
	if (!eb) {
		WARN_ON(1);
		goto out;
	}
	if (page != eb->pages[0])
		goto out;

	if (!btrfs_try_tree_write_lock(eb)) {
		flush_fn(data);
		btrfs_tree_lock(eb);
	}
	btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);

	if (test_and_clear_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) {
		spin_lock(&root->fs_info->delalloc_lock);
		if (root->fs_info->dirty_metadata_bytes >= eb->len)
			root->fs_info->dirty_metadata_bytes -= eb->len;
		else
			WARN_ON(1);
		spin_unlock(&root->fs_info->delalloc_lock);
	}

	btrfs_tree_unlock(eb);
out:
	if (!trylock_page(page)) {
		flush_fn(data);
		lock_page(page);
	}
	return 0;
}

static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
			      int read_only)
{
@@ -3787,7 +3741,6 @@ int btrfs_cleanup_transaction(struct btrfs_root *root)
}

static struct extent_io_ops btree_extent_io_ops = {
	.write_cache_pages_lock_hook = btree_lock_page_hook,
	.readpage_end_io_hook = btree_readpage_end_io_hook,
	.readpage_io_failed_hook = btree_io_failed_hook,
	.submit_bio_hook = btree_submit_bio_hook,