linux-kernel - Re: [PATCH V2 0/5] NestMMU pte upgrade workaround for mprotect

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Message-Id: <20181128141126.03004299897430353c37e889@linux-foundation.org>
Date:   Wed, 28 Nov 2018 14:11:26 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
Cc:     mpe@...erman.id.au, benh@...nel.crashing.org, paulus@...ba.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH V2 0/5] NestMMU pte upgrade workaround for mprotect

On Wed, 28 Nov 2018 20:04:33 +0530 "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com> wrote:

> We can upgrade pte access (R -> RW transition) via mprotect. We need
> to make sure we follow the recommended pte update sequence as outlined in
> commit: bd5050e38aec ("powerpc/mm/radix: Change pte relax sequence to handle nest MMU hang")
> for such updates. This patch series do that.

The mm bits look (mostly) OK to me.  I suggest all these be merged via
the appropriate powerpc tree.