From: Ted Ts'o <tytso@mit.edu>
Subject: Re: [PATCH] libext2fs: reserve exclude bitmap fields in group
 descriptor
Date: Thu, 15 Sep 2011 09:16:06 -0400
Message-ID: <20110915131606.GG15782@thunk.org>
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Cc: Andreas Dilger <adilger.kernel@dilger.ca>,
	"Darrick J. Wong" <djwong@us.ibm.com>,
	Sunil Mushran <sunil.mushran@oracle.com>,
	Andi Kleen <andi@firstfloor.org>,
	Mingming Cao <cmm@us.ibm.com>,
	Joel Becker <jlbec@evilplan.org>, linux-ext4@vger.kernel.org,
	Coly Li <colyli@gmail.com>,
	Yongqiang Yang <xiaoqiangnk@gmail.com>
To: Amir Goldstein <amir73il@gmail.com>
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On Thu, Sep 15, 2011 at 09:50:20AM +0300, Amir Goldstein wrote:
> -#define EXT2_FEATURE_COMPAT_EXCLUDE_INODE      0x0080
> +/* #define EXT2_FEATURE_COMPAT_EXCLUDE_INODE   0x0080 not used */
> +#define EXT2_FEATURE_COMPAT_EXCLUDE_BITMAP     0x0100

Why this change?  Is it because you're already using 0x0100 in
shipping systems?

						- Ted