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    SubjectRe: [RFC v1 1/4] dma-mapping: introduce the DMA_ATTR_MAY_SLEEP attribute
    On Mon, Mar 20, 2023 at 01:28:13PM +0100, Petr Tesarik wrote:
    > From: Petr Tesarik <petr.tesarik.ext@huawei.com>
    >
    > Introduce a DMA attribute to tell the DMA-mapping subsystem that
    > the operation is allowed to sleep.
    >
    > This patch merely adds the flag, which is not used for anything at
    > the moment. It should be used by users who can sleep (e.g. dma-buf
    > ioctls) to allow page reclaim and/or allocations from CMA.

    So what drivers would call this? As-is it doesn't have any users in
    the series.

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