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Date: Wed, 13 Mar 2013 11:37:39 -0500
From: Scott Wood <scottwood@freescale.com>
Subject: Re: [PATCH V4] powerpc/85xx: Add machine check handler to fix PCIe
 erratum on mpc85xx
To: David Laight <David.Laight@ACULAB.COM>
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 (from David.Laight@ACULAB.COM on Wed Mar 13 04:40:40 2013)
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Cc: Wood Scott-B07421 <B07421@freescale.com>, Stuart Yoder <b08248@gmail.com>,
 linuxppc-dev@lists.ozlabs.org, Jia Hongtao-B38951 <B38951@freescale.com>
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On 03/13/2013 04:40:40 AM, David Laight wrote:
> > Hmm, seems there's no probe_user_address() -- for userspace we
> > basically want the same thing minus the KERNEL_DS.  See
> > arch/powerpc/perf/callchain.c for an example.
>=20
> Isn't that just copy_from_user() ?

Plus pagefault_disable/enable().

-Scott=