Mikulas Patocka ee18026ac6
dm snapshot: do not use map_context ...
Eliminate struct map_info from dm-snap.
map_info->ptr was used in dm-snap to indicate if the bio was tracked.
If map_info->ptr was non-NULL, the bio was linked in tracked_chunk_hash.
This patch removes the use of map_info->ptr. We determine if the bio was
tracked based on hlist_unhashed(&c->node). If hlist_unhashed is true,
the bio is not tracked, if it is false, the bio is tracked.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com >
Signed-off-by: Alasdair G Kergon <agk@redhat.com >
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Mikulas Patocka
ee18026ac6