linux-kernel - Re: [PATCH 2/2] cxl: add set/get private data to context struct

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Message-ID: <1439962396.24918.8.camel@ellerman.id.au>
Date:	Wed, 19 Aug 2015 15:33:16 +1000
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Ian Munsie <imunsie@....ibm.com>
Cc:	Matt Ochs <mrochs@...ibm.com>,
	linuxppc-dev <linuxppc-dev@...abs.org>,
	mikey <mikey@...ling.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] cxl: add set/get private data to context struct

On Wed, 2015-08-19 at 15:12 +1000, Ian Munsie wrote:
> Excerpts from Michael Ellerman's message of 2015-08-19 14:49:30 +1000:
> > Do we really need the accessors? They don't buy anything I can see over just
> > using ctx->priv directly.
> 
> The reasoning there is because we don't currently expose the contents of
> stuct cxl_context to afu drivers, rather they just treat it as an opaque
> type.
> 
> We could potentially change this to expose the details, but there's a
> lot of junk in there that's just internal details of the cxl driver that
> isn't of interest to an afu driver that I'd rather not expose.
> 
> We also already have another accessor function (cxl_process_element) in
> the api, so it's not out of place.
> 
> FWIW I'm not opposed to changing how this api works if it ultimately
> makes things better, but I want to wait until the cxlflash superpipe
> support is merged so any patches that change the api can change it at
> the same time.

OK. I saw struct cxl_context in cxl.h and figured it was public, but it's in
drivers/misc/cxl/cxl.h, so yes other drivers have no business poking in there,
even though they *could*.

So that's fine.

cheers


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