Re: [PATCHSET block#for-2.6.36-post] block: replace barrier with sequenced flush

[Christoph Hellwig]

FYI: One issue with this series is that make_request based drivers
not have to access all REQ_FLUSH and REQ_FUA requests.  We'll either
need to add handling to empty REQ_FLUSH requests to all of them or
figure out a way to prevent them getting sent.  That is assuming they'll
simply ignore REQ_FLUSH/REQ_FUA on normal writes.

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