asmlinkage void __sched __ipipe_preempt_schedule_irq(void)
{
struct ipipe_percpu_domain_data *p;
unsigned long flags;
BUG_ON(!hard_irqs_disabled());
local_irq_save(flags);
hard_local_irq_enable();
preempt_schedule_irq(); /* Ok, may reschedule now. */
hard_local_irq_disable();
/*
* Flush any pending interrupt that may have been logged after
* preempt_schedule_irq() stalled the root stage before
* returning to us, and now.
*/
p = ipipe_this_cpu_root_context();
if (unlikely(__ipipe_ipending_p(p))) {
add_preempt_count(PREEMPT_ACTIVE);
trace_hardirqs_on();
__clear_bit(IPIPE_STALL_FLAG, &p->status);
__ipipe_sync_stage();
sub_preempt_count(PREEMPT_ACTIVE);
}
__ipipe_restore_root_nosync(flags);
}
asmlinkage extern void
end_of_interrupt(int syscall,struct pt_regs* regs)
{
unsigned int flags;
if(user_mode(regs)){
/*return to userpace*/
flags=atomic_get_thread_flags();
while(flags & _TIF_WORK_MASK){
if(flags & _TIF_NEED_RESCHED){
schedule();
flags=atomic_get_thread_flags();
continue;
}
do_notify_resume(syscall,flags,regs);
break;
}
}else{
/*return to kernelspace*/
#ifdef CONFIG_PREEMPT
local_irq_disable();
if(preempt_count()){
/*
*FIXME: if (exception path) return;
*/
if(current_thread_info()->flags & _TIF_NEED_RESCHED){
preempt_schedule_irq();
}
}
#endif
}
return;
}
