linux-kernel - Re: DMA direct mapping fix for 5.4 and earlier stable branches

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Date:   Tue, 9 Feb 2021 11:39:54 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     obayashi.yoshimasa@...ionext.com
Cc:     sumit.garg@...aro.org, hch@....de, m.szyprowski@...sung.com,
        robin.murphy@....com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        daniel.thompson@...aro.org
Subject: Re: DMA direct mapping fix for 5.4 and earlier stable branches

On Tue, Feb 09, 2021 at 10:19:07AM +0000, obayashi.yoshimasa@...ionext.com wrote:
> > How do you judge "mature"?
> 
>   My basic criteria are
> * Function is exist, but bug fix is necessary: "mature"
> * Function extension is necessary: "immature"
> 
> > And again, if a feature isn't present in a specific kernel version, why would you think that it would be
> > a viable solution for you to use?
> 
>   So, "a feature isn't present in a specific kernel version", 
> also means "immature" according to my criteria.

Great, please use the 5.10 or newer kernel release then.

thanks,

greg k-h