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Date:   Fri, 22 Jan 2021 17:26:47 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Tom Talpey <tom@talpey.com>
Cc:     Chuck Lever <chuck.lever@oracle.com>, linux-nfs@vger.kernel.org,
        linux-rdma@vger.kernel.org
Subject: Re: [PATCH v1 2/2] svcrdma: DMA-sync the receive buffer in
 svc_rdma_recvfrom()
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On Fri, Jan 22, 2021 at 09:37:02AM -0500, Tom Talpey wrote:
> Is there an asynchronous version of ib_dma_sync?

No.  These routines basically compile down to cache writeback and/or
invalidate instructions without much logic around them.