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ext4: let ext4_group_add_blocks() handle 0 blocks quickly

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If ext4_group_add_blocks() is called with 0 block, make it return 0
without doing any extra work.

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Yongqiang Yang 2011-07-26 21:51:08 -04:00 committed by Theodore Ts'o
parent cc7365dfe4
commit 4740b830ed
1 changed files with 3 additions and 0 deletions
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3
fs/ext4/mballoc.c
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@ -4691,6 +4691,9 @@ 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