From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Sun, 16 May 2010 11:00:00 +0000 (-0400)
Subject: ext4: clean up inode bitmaps manipulation in ext4_free_inode
X-Git-Tag: v2.6.35-rc1~39^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d17413c08cd2b1dd2bf2cfdbb0f7b736b2b2b15c;p=pandora-kernel.git

ext4: clean up inode bitmaps manipulation in ext4_free_inode

- Reorganize locking scheme to batch two atomic operation in to one.
  This also allow us to state what healthy group must obey following rule
  ext4_free_inodes_count(sb, gdp) == ext4_count_free(inode_bitmap, NUM);
- Fix possible undefined pointer dereference.
- Even if group descriptor stats aren't accessible we have to update
  inode bitmaps.
- Move non-group members update out of group_lock.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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