From: Avantika Mathur <mathur@us.ibm.com>
Date: Tue, 29 Jan 2008 04:58:27 +0000 (-0500)
Subject: ext4: add ext4_group_t, and change all group variables to this type.
X-Git-Tag: v2.6.25-rc1~1166^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd2d42912f9f09e5250cb3b024ee0625704e9cb7;p=pandora-kernel.git

ext4: add ext4_group_t, and change all group variables to this type.

In many places variables for block group are of type int, which limits the
maximum number of block groups to 2^31.  Each block group can have up to
2^15 blocks, with a 4K block size,  and the max filesystem size is limited to
2^31 * (2^15 * 2^12) = 2^58  -- or 256 PB

This patch introduces a new type ext4_group_t, of type unsigned long, to
represent block group numbers in ext4.
All occurrences of block group variables are converted to type ext4_group_t.

Signed-off-by: Avantika Mathur <mathur@us.ibm.com>
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