dm space map metadata: skip useless memcpy in metadata_ll_init_index()

When metadata_ll_init_index() is called by sm_ll_new_metadata(),
ll->mi_le hasn't been initialized yet. So, when
metadata_ll_init_index() copies the contents of ll->mi_le into the
newly allocated bitmap_root, it is just copying garbage. ll->mi_le
will be allocated later in sm_ll_extend() and copied into the
bitmap_root, in sm_ll_commit().

Signed-off-by: Benjamin Marzinski <[e-mail]>
Signed-off-by: Mike Snitzer <[e-mail]>

drivers/md/persistent-data/dm-space-map-common.c

···
 	if (r < 0)
 		return r;
 
-	memcpy(dm_block_data(b), &ll->mi_le, sizeof(ll->mi_le));
 	ll->bitmap_root = dm_block_location(b);
 
 	dm_tm_unlock(ll->tm, b);