linux-kernel - Re: [PATCH RESEND v1 4/4] powerpc/vdso: Add support for time namespaces

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Message-ID: <YGqXKkLDwDb589Qg@gmail.com>
Date:   Sun, 4 Apr 2021 21:50:50 -0700
From:   Andrei Vagin <avagin@...il.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        dima@...sta.com, arnd@...db.de, tglx@...utronix.de,
        vincenzo.frascino@....com, luto@...nel.org,
        linux-arch@...r.kernel.org
Subject: Re: [PATCH RESEND v1 4/4] powerpc/vdso: Add support for time
 namespaces

On Wed, Mar 31, 2021 at 04:48:47PM +0000, Christophe Leroy wrote:
> This patch adds the necessary glue to provide time namespaces.
> 
> Things are mainly copied from ARM64.
> 
> __arch_get_timens_vdso_data() calculates timens vdso data position
> based on the vdso data position, knowing it is the next page in vvar.
> This avoids having to redo the mflr/bcl/mflr/mtlr dance to locate
> the page relative to running code position.
>

Acked-by: Andrei Vagin <avagin@...il.com>
 
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>