mwait_cpu_dead
static DEFINE_PER_CPU_ALIGNED(struct mwait_cpu_dead, mwait_cpu_dead);
struct mwait_cpu_dead *md = this_cpu_ptr(&mwait_cpu_dead);
struct mwait_cpu_dead *md;
md = per_cpu_ptr(&mwait_cpu_dead, cpu);
this_cpu_write(mwait_cpu_dead.status, 0);
this_cpu_write(mwait_cpu_dead.control, 0);