linux-kernel - Re: [PATCH] dma-mapping: Don't store redundant offsets

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Date:   Mon, 27 Nov 2023 15:41:12 -0600
From:   Rob Herring <robh@...nel.org>
To:     Robin Murphy <robin.murphy@....com>
Cc:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        frowand.list@...il.com, james.quinlan@...adcom.com,
        m.szyprowski@...sung.com, hch@....de, devicetree@...r.kernel.org,
        lenb@...nel.org, robh+dt@...nel.org, rafael@...nel.org,
        iommu@...ts.linux.dev
Subject: Re: [PATCH] dma-mapping: Don't store redundant offsets


On Fri, 24 Nov 2023 18:10:03 +0000, Robin Murphy wrote:
> A bus_dma_region necessarily stores both CPU and DMA base addresses for
> a range, so there's no need to also store the difference between them.
> 
> Signed-off-by: Robin Murphy <robin.murphy@....com>
> ---
>  drivers/acpi/scan.c        |  1 -
>  drivers/of/address.c       |  1 -
>  include/linux/dma-direct.h | 19 ++++++++++++-------
>  kernel/dma/direct.c        |  1 -
>  4 files changed, 12 insertions(+), 10 deletions(-)
> 

Acked-by: Rob Herring <robh@...nel.org>