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The following reply was made to PR kern/48799; it has been noted by GNATS.
From: "Thomas Schmitt" <scdbackup%gmx.net@localhost>
Subject: Re: kern/48799
Date: Sun, 11 May 2014 12:17:19 +0200
After finishing my assessment of struct ifid.ifid_start,
i now understand better the remark of Taylor R Campbell in
"The ifid_start field seems to be unused, incidentally,
so we needn't even expand the size of cd9660 file handles."
I had the wrong impression that struct fid would be a maximum
sized wrapper, like a union. But now i see the size inquiry
protocol of VFS_VPTOFH(,fh_size).
So i will update my patch by a few ifdefs which exclude the
member .ifid_start from struct ifid by default.
For completeness, i also quote Taylor's other remark:
"As an aside, it seems from glancing at struct ufid in ufs/ufs/inode.h
that UFS will have a similar 32-bit overflow problem."
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