linux-kernel - Re: [PATCH 1/6] swiotlb: remove a pointless comment

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Message-ID: <20180518202203.GI23713@char.us.oracle.com>
Date:   Fri, 18 May 2018 16:22:04 -0400
From:   Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:     Christoph Hellwig <hch@....de>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] swiotlb: remove a pointless comment

On Tue, May 15, 2018 at 08:05:18PM +0200, Christoph Hellwig wrote:
> This comments describes an aspect of the map_sg interface that isn't
> even exploited by swiotlb.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Applied.
> ---
>  lib/swiotlb.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/lib/swiotlb.c b/lib/swiotlb.c
> index 16ace0e25d52..721f93677eee 100644
> --- a/lib/swiotlb.c
> +++ b/lib/swiotlb.c
> @@ -927,12 +927,6 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
>   * appropriate dma address and length.  They are obtained via
>   * sg_dma_{address,length}(SG).
>   *
> - * NOTE: An implementation may be able to use a smaller number of
> - *       DMA address/length pairs than there are SG table elements.
> - *       (for example via virtual mapping capabilities)
> - *       The routine returns the number of addr/length pairs actually
> - *       used, at most nents.
> - *
>   * Device ownership issues as mentioned above for swiotlb_map_page are the
>   * same here.
>   */
> -- 
> 2.17.0
>