From patchwork Wed Sep 9 09:49:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikolay Borisov X-Patchwork-Id: 11765203 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 86FDA59D for ; Wed, 9 Sep 2020 09:49:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 755A321D7D for ; Wed, 9 Sep 2020 09:49:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729521AbgIIJtg (ORCPT ); Wed, 9 Sep 2020 05:49:36 -0400 Received: from mx2.suse.de ([195.135.220.15]:54014 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728458AbgIIJtV (ORCPT ); Wed, 9 Sep 2020 05:49:21 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 5EEF9B162; Wed, 9 Sep 2020 09:49:20 +0000 (UTC) From: Nikolay Borisov To: linux-btrfs@vger.kernel.org Cc: Nikolay Borisov Subject: [PATCH 04/10] btrfs: Remove btree_get_extent Date: Wed, 9 Sep 2020 12:49:08 +0300 Message-Id: <20200909094914.29721-5-nborisov@suse.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200909094914.29721-1-nborisov@suse.com> References: <20200909094914.29721-1-nborisov@suse.com> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org The sole purpose of this function was to satisfy the requirements of __do_readpage. Since that function is no longer used to read metadata pages the need to keep btree_get_extent around has also disappeared. Simply remove it. Signed-off-by: Nikolay Borisov Reviewed-by: Josef Bacik --- fs/btrfs/disk-io.c | 46 ---------------------------------------------- fs/btrfs/disk-io.h | 2 -- 2 files changed, 48 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index c6c9b6b13bf0..2a5aadcf6b54 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -204,52 +204,6 @@ void btrfs_set_buffer_lockdep_class(u64 objectid, struct extent_buffer *eb, #endif -/* - * extents on the btree inode are pretty simple, there's one extent - * that covers the entire device - */ -struct extent_map *btree_get_extent(struct btrfs_inode *inode, - struct page *page, u64 start, u64 len) -{ - struct extent_map_tree *em_tree = &inode->extent_tree; - struct extent_map *em; - int ret; - - read_lock(&em_tree->lock); - em = lookup_extent_mapping(em_tree, start, len); - if (em) { - read_unlock(&em_tree->lock); - goto out; - } - read_unlock(&em_tree->lock); - - em = alloc_extent_map(); - if (!em) { - em = ERR_PTR(-ENOMEM); - goto out; - } - em->start = 0; - em->len = (u64)-1; - em->block_len = (u64)-1; - em->block_start = 0; - - write_lock(&em_tree->lock); - ret = add_extent_mapping(em_tree, em, 0); - if (ret == -EEXIST) { - free_extent_map(em); - em = lookup_extent_mapping(em_tree, start, len); - if (!em) - em = ERR_PTR(-EIO); - } else if (ret) { - free_extent_map(em); - em = ERR_PTR(ret); - } - write_unlock(&em_tree->lock); - -out: - return em; -} - /* * Compute the csum of a btree block and store the result to provided buffer. */ diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index dbc8c353c86c..89b6a709a184 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -123,8 +123,6 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, u64 objectid); int btree_lock_page_hook(struct page *page, void *data, void (*flush_fn)(void *)); -struct extent_map *btree_get_extent(struct btrfs_inode *inode, - struct page *page, u64 start, u64 len); int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags); int __init btrfs_end_io_wq_init(void); void __cold btrfs_end_io_wq_exit(void);