linux-kernel - Re: [PATCH 1/6] mm: introduce an additional vma bit for powerpc pkey

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Message-ID: <20170922161243.7d03a5b6@firefly.ozlabs.ibm.com>
Date:   Fri, 22 Sep 2017 16:12:43 +1000
From:   Balbir Singh <bsingharora@...il.com>
To:     Ram Pai <linuxram@...ibm.com>
Cc:     mpe@...erman.id.au, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-mm@...ck.org, x86@...nel.org, linux-doc@...r.kernel.org,
        arnd@...db.de, akpm@...ux-foundation.org, corbet@....net,
        mingo@...hat.com, benh@...nel.crashing.org, paulus@...ba.org,
        khandual@...ux.vnet.ibm.com, aneesh.kumar@...ux.vnet.ibm.com,
        hbabu@...ibm.com, mhocko@...nel.org, bauerman@...ux.vnet.ibm.com,
        ebiederm@...ssion.com
Subject: Re: [PATCH 1/6] mm: introduce an additional vma bit for powerpc
 pkey

On Fri, 15 Sep 2017 18:21:05 -0700
Ram Pai <linuxram@...ibm.com> wrote:

> Currently only 4bits are allocated in the vma flags to hold 16
> keys. This is sufficient for x86. PowerPC  supports  32  keys,
> which needs 5bits. This patch allocates an  additional bit.
> 
> Signed-off-by: Ram Pai <linuxram@...ibm.com>
> ---

Acked-by: Balbir Singh <bsingharora@...il.com>