Revert "block: Fix unaligned zero write"
This reverts commit fc3959e4. The core write code already handles the case, so remove this duplication. Because commit 61007b31 moved the touched code from block.c to block/io.c, the change is manually reverted. Signed-off-by: NFam Zheng <famz@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Message-id: 1431522721-3266-2-git-send-email-famz@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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