[Devel] [PATCH 4/4] x86/arch_prctl/vdso: add ARCH_MAP_VDSO_*

[Vladimir Davydov]

On Tue, Jul 26, 2016 at 05:25:02PM +0300, Dmitry Safonov wrote:
> Add API to change vdso blob type with arch_prctl.
> As this is usefull only by needs of CRIU, expose
> this interface under CONFIG_CHECKPOINT_RESTORE.
> 
> Cc: Andy Lutomirski <luto at kernel.org>
> Cc: Ingo Molnar <mingo at redhat.com>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> Cc: "H. Peter Anvin" <hpa at zytor.com>
> 
> [Differences to vanilla patches:
>  o API only for 32-bit vDSO mapping
>  o unmap previous vdso just by mm->context.vdso pointer]
> Signed-off-by: Dmitry Safonov <dsafonov at virtuozzo.com>

Reviewed-by: Vladimir Davydov <vdavydov at virtuozzo.com>