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H A Ddm.cdiff b01cd5ac43b00c49759c126c21e7d22c7e80b245 Wed Oct 01 08:39:24 CDT 2008 Mikulas Patocka <mpatocka@redhat.com> dm: cope with access beyond end of device in dm_merge_bvec

If for any reason dm_merge_bvec() is given an offset beyond the end of the
device, avoid an oops and always allow one page to be added to an empty bio.
We'll reject the I/O later after the bio is submitted.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>