local64_sub
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &event->hw.period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(delta, &hwc->period_left);
local64_sub(val, &p->v);