From: Frederic Bohe <frederic.bohe@bull.net>
Date: Sun, 16 Nov 2008 16:05:40 +0000 (-0500)
Subject: ext4: add checksum calculation when clearing UNINIT flag in ext4_new_inode
X-Git-Tag: v2.6.27.8~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e1ad219f708c0d92061ca7cc483b200f9a2e892;p=pandora-kernel.git

ext4: add checksum calculation when clearing UNINIT flag in ext4_new_inode

(cherry picked from commit 23712a9c28b9f80a8cf70c8490358d5f562d2465)

When initializing an uninitialized block group in ext4_new_inode(),
its block group checksum must be re-calculated.  This fixes a race
when several threads try to allocate a new inode in an UNINIT'd group.

There is some question whether we need to be initializing the block
bitmap in ext4_new_inode() at all, but for now, if we are going to
init the block group, let's eliminate the race.

Signed-off-by: Frederic Bohe <frederic.bohe@bull.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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