[PATH V2 5/6] arm64: mm: Enable HAVE_RCU_TABLE_FREE logic

[Catalin Marinas]

On Thu, Aug 21, 2014 at 04:43:31PM +0100, Steve Capper wrote:
> In order to implement fast_get_user_pages we need to ensure that the
> page table walker is protected from page table pages being freed from
> under it.
> 
> This patch enables HAVE_RCU_TABLE_FREE, any page table pages belonging
> to address spaces with multiple users will be call_rcu_sched freed.
> Meaning that disabling interrupts will block the free and protect the
> fast gup page walker.
> 
> Signed-off-by: Steve Capper <steve.capper at linaro.org>

I'm happy to take this patch independently of this series. But if the
whole series goes in via some other tree (mm):

Acked-by: Catalin Marinas <catalin.marinas at arm.com>