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authorYongqiang Yang <xiaoqiangnk@gmail.com>2011-07-26 21:51:08 -0400
committerTheodore Ts'o <tytso@mit.edu>2011-07-26 21:51:08 -0400
commit4740b830ed5720ade6c780dbf3fdfe9089b3552d (patch)
tree7236a6b16db7d3cf8ef8cf5a6d86dac85df01b01 /fs/ext4
parentcc7365dfe48cb2191f1572bf69e30d3e58716313 (diff)
downloadop-kernel-dev-4740b830ed5720ade6c780dbf3fdfe9089b3552d.zip
op-kernel-dev-4740b830ed5720ade6c780dbf3fdfe9089b3552d.tar.gz
ext4: let ext4_group_add_blocks() handle 0 blocks quickly
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>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/mballoc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index dbe4295..b6ef4da39 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -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
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