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

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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 <bart.vanassche@xxxxxxxxxxx>--
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