From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-da0-f46.google.com ([209.85.210.46]:45922 "EHLO mail-da0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752749Ab2JHN00 (ORCPT ); Mon, 8 Oct 2012 09:26:26 -0400 Message-ID: <5072D477.3070303@gmail.com> Date: Mon, 08 Oct 2012 21:26:15 +0800 From: Wang Sheng-Hui MIME-Version: 1.0 To: chris.mason@fusionio.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] Btrfs: remove repeated eb->pages check in, disk-io.c/csum_dirty_buffer Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-btrfs-owner@vger.kernel.org List-ID: In csum_dirty_buffer, we first get eb from page->private. Then we check if the page is the first page of eb. Later we check it again. Remove the repeated check here. Signed-off-by: Wang Sheng-Hui --- fs/btrfs/disk-io.c | 8 +++----- 1 files changed, 3 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 22e98e0..8919c56 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -432,14 +432,12 @@ static int csum_dirty_buffer(struct btrfs_root *root, struct page *page) tree = &BTRFS_I(page->mapping->host)->io_tree; eb = (struct extent_buffer *)page->private; - if (page != eb->pages[0]) - return 0; - found_start = btrfs_header_bytenr(eb); - if (found_start != start) { + if (page != eb->pages[0]) { WARN_ON(1); return 0; } - if (eb->pages[0] != page) { + found_start = btrfs_header_bytenr(eb); + if (found_start != start) { WARN_ON(1); return 0; } -- 1.7.5.4