From: Darrick J. Wong <djwong@us.ibm.com>
Date: Sun, 29 Apr 2012 22:29:10 +0000 (-0400)
Subject: ext4: calculate and verify superblock checksum
X-Git-Tag: v3.5-rc1~16^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9c4731780544d52b243bf46e4dd635c67fa9f84;p=pandora-kernel.git

ext4: calculate and verify superblock checksum

Calculate and verify the superblock checksum.  Since the UUID and
block group number are embedded in each copy of the superblock, we
need only checksum the entire block.  Refactor some of the code to
eliminate open-coding of the checksum update call.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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