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    SubjectRe: [PATCH 29/30] block: remove the BLKDEV_IFL_BARRIER flag
    On Wed, Aug 25, 2010 at 05:47:46PM +0200, Tejun Heo wrote:
    > From: Christoph Hellwig <hch@infradead.org>
    >
    > Remove support for barriers on discards, which is unused now. Also
    > remove the DISCARD_NOBARRIER I/O type in favour of just setting the
    > rw flags up locally in blkdev_issue_discard.
    >
    > tj: Also remove DISCARD_SECURE and use REQ_SECURE directly.

    REQ_SECURE was just added for mmc. I assume they plan to submit the
    driver support soon.



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