asmlinkage int sys_idle(void)
{
unsigned long start_idle = 0;
if (current->pid != 0)
return -EPERM;
/* endless idle loop with no priority at all */
current->counter = -100;
for (;;)
{
/*
* We are locked at this point. So we can safely call
* the APM bios knowing only one CPU at a time will do
* so.
*/
if (!start_idle)
start_idle = jiffies;
if (jiffies - start_idle > HARD_IDLE_TIMEOUT)
{
hard_idle();
}
else
{
if (hlt_works_ok && !hlt_counter && !need_resched)
__asm__("hlt");
}
if (need_resched)
start_idle = 0;
schedule();
}
}
/*
* The idle loop on a uniprocessor i386..
*/
static int cpu_idle(void *unused)
{
int work = 1;
unsigned long start_idle = 0;
/* endless idle loop with no priority at all */
current->priority = 0;
current->counter = -100;
for (;;) {
if (work)
start_idle = jiffies;
if (jiffies - start_idle > HARD_IDLE_TIMEOUT)
hard_idle();
else {
if (boot_cpu_data.hlt_works_ok && !hlt_counter && !current->need_resched)
__asm__("hlt");
}
work = current->need_resched;
schedule();
check_pgt_cache();
}
}
