Re: [PATCH 2/6] x86/vdso: introduce do_map_vdso() and vdso_type enum

From: Cyrill Gorcunov
Date: Fri Jun 03 2016 - 05:50:24 EST

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@xxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Signed-off-by: Dmitry Safonov <dsafonov@xxxxxxxxxxxxx>

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?