CURRENT_OBJCG_UPDATE_FLAG
((unsigned long)old & ~CURRENT_OBJCG_UPDATE_FLAG);
if (unlikely((unsigned long)objcg & CURRENT_OBJCG_UPDATE_FLAG))
task->objcg = (struct obj_cgroup *)CURRENT_OBJCG_UPDATE_FLAG;
((unsigned long)objcg & ~CURRENT_OBJCG_UPDATE_FLAG);