CPU_DEAD
while (per_cpu(cpu_state, cpu) != CPU_DEAD)
__this_cpu_write(cpu_state, CPU_DEAD);
__this_cpu_write(cpu_state, CPU_DEAD);
while (per_cpu(cpu_state, cpu) != CPU_DEAD)
per_cpu(cpu_state, cpu) = CPU_DEAD;
while (per_cpu(cpu_state, cpu) != CPU_DEAD)
per_cpu(cpu_state, cpu) = CPU_DEAD;
return per_cpu(cpu_state, cpu) == CPU_DEAD;
__this_cpu_write(cpu_state, CPU_DEAD);
if (per_cpu(cpu_state, cpu) == CPU_DEAD) {