ext2: trivial fix to comment for ext2_free_blocks

The function is ext2_free_blocks(), not ext2_free_blocks_sb().

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index a9bba1e..89991ff 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -477,7 +477,7 @@
 }
 
 /**
- * ext2_free_blocks_sb() -- Free given blocks and update quota and i_blocks
+ * ext2_free_blocks() -- Free given blocks and update quota and i_blocks
  * @inode:		inode
  * @block:		start physcial block to free
  * @count:		number of blocks to free