RB_HEAD_WRAP_CNT_OFF  819 drivers/gpu/drm/i915/gvt/scheduler.c 	wrap_count = workload->guest_rb_head >> RB_HEAD_WRAP_CNT_OFF;
RB_HEAD_WRAP_CNT_OFF  828 drivers/gpu/drm/i915/gvt/scheduler.c 	head = (wrap_count << RB_HEAD_WRAP_CNT_OFF) | tail;