linux-kernel - Re: [PATCH 2/6] x86/vdso: introduce do_map_vdso() and vdso

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Date:	Fri, 3 Jun 2016 12:50:14 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Dmitry Safonov <dsafonov@...tuozzo.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	luto@...capital.net, tglx@...utronix.de, hpa@...or.com,
	x86@...nel.org, 0x7f454c46@...il.com, oleg@...hat.com,
	xemul@...tuozzo.com, khorenko@...tuozzo.com,
	Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH 2/6] x86/vdso: introduce do_map_vdso() and vdso_type enum

On Wed, Jun 01, 2016 at 04:11:33PM +0300, Dmitry Safonov wrote:
> Make in-kernel API to map vDSO blobs on x86.
> 
> Cc: Andy Lutomirski <luto@...nel.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: "H. Peter Anvin" <hpa@...or.com>
> Signed-off-by: Dmitry Safonov <dsafonov@...tuozzo.com>

Hi! Sorry for delay in reply. Dima, here is a moment I somehow missing:
when do_map_vdso is called it is implied that old vdso is unmapped already,
or both can be present in the system?