# Re: \[PATCH 03/18\] block: fix elevator init check

- From: Bart Van Assche \<hidden\>
- Date: 2017-01-26 23:21:49 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2017/01/6370501
- Thread: https://ratatoskr.run/linux-scsi/2017/01/6370318/t.md

```text
On Wed, 2017-01-25 at 18:25 +0100, Christoph Hellwig wrote:
> We can't initalize the elevator fields for flushes as flush share space
> in struct request with the elevator data.  But currently we can't
> commnicate that a request is a flush through blk_get_request as we
> can only pass READ or WRITE, and the low-level code looks at the
> possible NULL bio to check for a flush.
> 
> Fix this by allowing to pass any block op and flags, and by checking for
> the flush flags in __get_request.

Reviewed-by: Bart Van Assche <redacted>
```