[PATCH v4 0/2] context tracker support for arm64

Larry Bassel [off-list ref] writes:

Implement and enable context tracking for arm64 (which is
a prerequisite for FULL_NOHZ support). This patchset
builds upon earlier work by Kevin Hilman and is based on
Will Deacon's tree.

Tested-by: Kevin Hilman <redacted>

Test this with NO_HZ_FULL on v3.15-rc5 merged with the aarch64 branch
from Will's tree on the foundation model (with the DT modified so the
arch timer doesn't enter C3_STOP mode.)

Kevin