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Date:   Thu, 30 Aug 2018 10:58:50 -0700
From:   Christoph Hellwig <>
To:     Ezequiel Garcia <>
        Laurent Pinchart <>,
        Tomasz Figa <>,
        "Matwey V . Kornilov" <>,
        Alan Stern <>,,
        Keiichi Watanabe <>
Subject: Re: [RFC 2/3] USB: core: Add non-coherent buffer allocation helpers

Please don't introduce new DMA_ATTR_NON_CONSISTENT users, it is
a rather horrible interface, and I plan to kill it off rather sooner
than later.  I plan to post some patches for a better interface
that can reuse the normal dma_sync_single_* interfaces for ownership
transfers.  I can happily include usb in that initial patch set based
on your work here if that helps.

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