static void smp_halt(void)
{
int cpuid = safe_smp_processor_id();
static int first_entry = 1;
if (reboot_force)
return;
if (first_entry) {
first_entry = 0;
smp_call_function((void *)machine_restart, NULL, 1, 0);
}
smp_stop_cpu();
/* AP calling this. Just halt */
if (cpuid != boot_cpu_id) {
for (;;)
asm("hlt");
}
/* Wait for all other CPUs to have run smp_stop_cpu */
while (!cpus_empty(cpu_online_map))
rep_nop();
}
void smp_send_stop(void)
{
int nolock = 0;
/* Don't deadlock on the call lock in panic */
if (!spin_trylock(&call_lock)) {
/* ignore locking because we have paniced anyways */
nolock = 1;
}
__smp_call_function(smp_really_stop_cpu, NULL, 0, 0);
if (!nolock)
spin_unlock(&call_lock);
smp_stop_cpu();
}
void smp_send_stop(void)
{
smp_call_function(smp_really_stop_cpu, NULL, 1, 0);
smp_stop_cpu();
}
static void smp_really_stop_cpu(void *dummy)
{
smp_stop_cpu();
for (;;)
asm("hlt");
}
static void smp_really_stop_cpu(void *dummy)
{
smp_stop_cpu();
for (;;)
halt();
}
