tree 1e5bc5e7b2c57b343fab13709178be3aff6f477e
parent 65b32a573eefa1cdd3cbe5ea59326308e6c3b9ad
author Martin K. Petersen <martin.petersen@oracle.com> 1261407351 +0100
committer Jens Axboe <jens.axboe@oracle.com> 1261407351 +0100

block: Fix topology stacking for data and discard alignment

The stacking code incorrectly scaled up the data offset in some cases
causing misaligned devices to report alignment.  Rewrite the stacking
algorithm to remedy this and apply the same alignment principles to the
discard handling.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>