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#include <linux/list.h>
#include <linux/bitops.h>
#include <linux/percpu.h>
#include <linux/module.h>
#include <linux/smp.h>
#include <litmus/norqlock.h>
struct worklist {
struct no_rqlock_work* next;
int hrtimer_hack;
};
static DEFINE_PER_CPU(struct worklist, norq_worklist) = {NULL, 0};
void init_no_rqlock_work(struct no_rqlock_work* w, work_t work,
unsigned long arg)
{
w->active = 0;
w->work = work;
w->arg = arg;
w->next = NULL;
}
void __do_without_rqlock(struct no_rqlock_work *work)
{
long flags;
struct worklist* wl;
local_irq_save(flags);
wl = &__get_cpu_var(norq_worklist);
work->next = wl->next;
wl->next = work;
local_irq_restore(flags);
}
void hrtimer_wakeup_hack(int onoff)
{
preempt_disable();
__get_cpu_var(norq_worklist).hrtimer_hack = onoff;
preempt_enable();
}
void tick_no_rqlock(void)
{
long flags;
struct no_rqlock_work *todo, *next;
struct worklist* wl;
local_irq_save(flags);
wl = &__get_cpu_var(norq_worklist);
if (wl->hrtimer_hack) {
/* bail out! */
local_irq_restore(flags);
return;
}
next = wl->next;
wl->next = NULL;
local_irq_restore(flags);
while (next) {
todo = next;
next = next->next;
todo->next = NULL;
smp_mb__before_clear_bit();
clear_bit(0, (void*) &todo->active);
todo->work(todo->arg);
}
}
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