linux-ext4 - [PATCH v2 05/11] ext4: let ext4_group_add

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Message-Id: <1311048137-16400-6-git-send-email-xiaoqiangnk@gmail.com>
Date:	Tue, 19 Jul 2011 12:02:11 +0800
From:	Yongqiang Yang <xiaoqiangnk@...il.com>
To:	linux-ext4@...r.kernel.org
Cc:	adilger@...ger.ca, amir73il@...il.com, tm@....ma,
	Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: [PATCH v2 05/11] ext4: let ext4_group_add_blocks() handle 0 blocks quickly

If ext4_group_add_blocks() is called with 0 block, it just return 0.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@...il.com>
---
 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

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