From e73a347b7723757bb5fb5c502814dc205a7f496d Mon Sep 17 00:00:00 2001
From: Amir Goldstein <amir73il@users.sf.net>
Date: Mon, 9 May 2011 21:40:01 -0400
Subject: [PATCH] ext4: implement ext4_add_groupblocks() by freeing blocks

The old imlementation used to take grp->alloc_sem and set the
GROUP_NEED_INIT flag, so that the buddy cache would be reloaded.

The new implementation updates the buddy cache by freeing the added
blocks and making them available for use, so there is no need to
reload the buddy cache and there is no need to take grp->alloc_sem.

Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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