linux-kernel - Re: [PATCH 1/4] dma-mapping: move the remaining DMA API calls out of line

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Date:   Wed, 15 Apr 2020 21:21:37 +1000
From:   Alexey Kardashevskiy <aik@...abs.ru>
To:     Christoph Hellwig <hch@....de>
Cc:     iommu@...ts.linux-foundation.org, linuxppc-dev@...ts.ozlabs.org,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        linux-kernel@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH 1/4] dma-mapping: move the remaining DMA API calls out of
 line



On 15/04/2020 16:18, Christoph Hellwig wrote:
> On Wed, Apr 15, 2020 at 12:26:04PM +1000, Alexey Kardashevskiy wrote:
>> May be this is correct and allowed (no idea) but removing exported
>> symbols at least deserves a mention in the commit log, does not it?
>>
>> The rest of the series is fine and works. Thanks,
> 
> Maybe I can throw in a line, but the point is that dma_direct_*
> was exported as dma_* called them inline.  Now dma_* is out of line
> and exported instead, which always was the actual API.

They become inline in 2/4.

And the fact they were exported leaves possibility that there is a
driver somewhere relying on these symbols or distro kernel won't build
because the symbol disappeared from exports (I do not know what KABI
guarantees or if mainline kernel cares). I do not care in particular but
some might, a line separated with empty lines in the commit log would do.


-- 
Alexey