tree 46d64e674bd137408ae0cc04eb6ea74075af2050
parent 3f9db6af3d8f8659637da7288e9e2bceda4366d0
author Sami Tolvanen <samitolvanen@google.com> 1433882550 +0100
committer Sami Tolvanen <samitolvanen@google.com> 1433883426 +0100

Zero blocks before BLKDISCARD

Due to observed BLKDISCARD flakiness, overwrite blocks that we want
to discard with zeros first to avoid later issues with dm-verity if
BLKDISCARD is not successful.

Bug: 20614277
Bug: 20881595
Change-Id: I0280fe115b020dcab35f49041fb55b7f8e793da3