From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yongqiang Yang Subject: [PATCH v2 05/11] ext4: let ext4_group_add_blocks() handle 0 blocks quickly Date: Tue, 19 Jul 2011 12:02:11 +0800 Message-ID: <1311048137-16400-6-git-send-email-xiaoqiangnk@gmail.com> References: <1311048137-16400-1-git-send-email-xiaoqiangnk@gmail.com> Cc: adilger@dilger.ca, amir73il@gmail.com, tm@tao.ma, Yongqiang Yang To: linux-ext4@vger.kernel.org Return-path: Received: from mail-iw0-f174.google.com ([209.85.214.174]:49578 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750928Ab1GSEGg (ORCPT ); Tue, 19 Jul 2011 00:06:36 -0400 Received: by mail-iw0-f174.google.com with SMTP id 6so3703318iwn.19 for ; Mon, 18 Jul 2011 21:06:36 -0700 (PDT) In-Reply-To: <1311048137-16400-1-git-send-email-xiaoqiangnk@gmail.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: If ext4_group_add_blocks() is called with 0 block, it just return 0. Signed-off-by: Yongqiang Yang --- fs/ext4/mballoc.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) v1->v2: nothing changed. diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 48784eb..397e27c 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4680,6 +4680,9 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1); + if (count == 0) + return 0; + ext4_get_group_no_and_offset(sb, block, &block_group, &bit); /* * Check to see if we are freeing blocks across a group -- 1.7.5.1