From 8a266467b8c4841ca994d0fe59f39e584650e3df Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Sat, 26 Jul 2008 14:34:21 -0400
Subject: [PATCH] ext4: Allow read/only mounts with corrupted block group
 checksums

If the block group checksums are corrupted, still allow the mount to
succeed, so e2fsck can have a chance to try to fix things up.  Add
code in the remount r/w path to make sure the block group checksums
are valid before allowing the filesystem to be remounted read/write.

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