linux-kernel - Re: [PATCH 1/4 RESEND] ACPI: scan: Export acpi_get_dma

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Date:   Thu, 17 Mar 2022 16:31:15 +0000
From:   Robin Murphy <robin.murphy@....com>
To:     Michael Kelley <mikelley@...rosoft.com>, sthemmin@...rosoft.com,
        kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
        decui@...rosoft.com, rafael@...nel.org, lenb@...nel.org,
        lorenzo.pieralisi@....com, robh@...nel.org, kw@...ux.com,
        bhelgaas@...gle.com, hch@....de, m.szyprowski@...sung.com,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-pci@...r.kernel.org,
        iommu@...ts.linux-foundation.org
Subject: Re: [PATCH 1/4 RESEND] ACPI: scan: Export acpi_get_dma_attr()

On 2022-03-17 16:25, Michael Kelley wrote:
> Export acpi_get_dma_attr() so that it can be used by the Hyper-V
> VMbus driver, which may be built as a module. The related function
> acpi_dma_configure_id() is already exported.

No. Use device_get_dma_attr() like everyone else, please.

Robin.

> Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
> ---
>   drivers/acpi/scan.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 1331756..9f3c88f 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -1489,6 +1489,7 @@ enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev)
>   	else
>   		return DEV_DMA_NON_COHERENT;
>   }
> +EXPORT_SYMBOL_GPL(acpi_get_dma_attr);
>   
>   /**
>    * acpi_dma_get_range() - Get device DMA parameters.