From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 9 Sep 2011 22:28:51 +0000 (-0400)
Subject: ext4: add ext4-specific kludge to avoid an oops after the disk disappears
X-Git-Tag: v3.2-rc1~85^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c2e70879fc0949b4220ee61b7c4553f6976a94d;p=pandora-kernel.git

ext4: add ext4-specific kludge to avoid an oops after the disk disappears

The del_gendisk() function uninitializes the disk-specific data
structures, including the bdi structure, without telling anyone
else.  Once this happens, any attempt to call mark_buffer_dirty()
(for example, by ext4_commit_super), will cause a kernel OOPS.

Fix this for now until we can fix things in an architecturally correct
way.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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