From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Mackerras <paulus@ozlabs.org>
Subject: Re: [PATCH kernel 4/9] powerpc/powernv/iommu: Add real mode version
 of xchg()
Date: Thu, 10 Mar 2016 19:46:21 +1100
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Cc: linuxppc-dev@lists.ozlabs.org,
	Alex Williamson <alex.williamson@redhat.com>,
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To: Alexey Kardashevskiy <aik@ozlabs.ru>
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On Mon, Mar 07, 2016 at 02:41:12PM +1100, Alexey Kardashevskiy wrote:
> In real mode, TCE tables are invalidated using different
> cache-inhibited store instructions which is different from
> the virtual mode.

I suggest "In real mode, TCE tables are invalidated using special
cache-inhibited store instructions which are not available in
virtual mode".

Also, the subject could make people think it's about the kernel xchg()
function defined in <asm/cmpxchg.h>.

Paul.