[PATCH] i915/selftest/igt_mmap: let mmap tests run in kthread

[Eugene Kobyak]

> When driver is loaded on system with numa nodes it might be run in kthread.
> This makes it impossible to use current->mm in selftests which currently
> creates null pointer exception.
> This patch allows selftest to use current->mm by using active_mm.
> 
> Signed-off-by: Mikolaj Wasiak <mikolaj.wasiak at intel.com>

Hi, LGTM
Reviewed-by: Eugene Kobyak <eugene.kobyak at intel.com>

Best regards
Eugene