Re: [PATCH 01/16] block: fix elevator init check

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On Tue, Jan 24, 2017 at 08:06:39AM -0700, Jens Axboe wrote:
> We check for REQ_PREFLUSH | REQ_FUA in so many places though, might not
> be a bad idea to keep the helper but just make it take the opf and fix
> up the other locations too. The fact that PREFLUSH|FUA is the magic to
> check for is somewhat tribal knowledge.

I'll see if I can come up with something sensible.  The current
helper using the bio and the magic 0 value is not exactly helpful.
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