From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Tue, 2 Mar 2010 13:08:51 +0000 (-0500)
Subject: ext4: Fix ext4_quota_write cross block boundary behaviour
X-Git-Tag: v2.6.34-rc1~199^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67eeb5685d2a211c0252ac7884142e503c759500;p=pandora-kernel.git

ext4: Fix ext4_quota_write cross block boundary behaviour

We always assume what dquot update result in changes in one data block
But ext4_quota_write() function may handle cross block boundary writes
In fact if this ever happen it will result in incorrect journal
credits reservation, and later a BUG_ON.  As soon this never happen
the boundary cross loop is NOOP.  In order to make things straight
let's remove this loop and assert cross boundary condition.

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