linux-kernel - Re: [PATCH 3/4] powerpc/crypto: add 842 hardware compression driver

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Date:	Mon, 30 Jul 2012 18:00:59 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Kent Yoder <key@...ux.vnet.ibm.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org,
	"David S. Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org
Subject: Re: [PATCH 3/4] powerpc/crypto: add 842 hardware compression driver

On Fri, 2012-07-20 at 09:01 -0500, Seth Jennings wrote:
> On 07/20/2012 12:33 AM, Michael Ellerman wrote:
> > On Thu, 2012-07-19 at 09:42 -0500, Seth Jennings wrote:
> >> This patch adds the driver for interacting with the 842
> >> compression accelerator on IBM Power7+ systems.
> > 
> > ...
> > 
> >> +struct nx842_slentry {
> >> +	unsigned long ptr; /* Absolute address (use virt_to_abs()) */
> >> /+	unsigned long len;
> >> +};
> > 
> > These days virt_to_abs() is just __pa() - ie. convert to a real address.
> 
> Thanks, I'll make that change.
> 
> Is it a blocker to the code being pulled in though? I'm
> hoping to get this in ASAP for the 3.6 merge window.  As
> this isn't a functional defect (I assume __pa() and
> virt_to_abs() still achieve the same result), can I get an
> OK from you that this isn't a blocker to the code being
> accepted?

Sorry I missed your reply. No it's not a blocker, just ugly.

I have sent a series to Ben which removes virt_to_abs() entirely, so
we'll want to make sure we fixup the nx driver before that goes in.

cheers

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