/**
* update_prio_tracer -
* @prio: equivalent to prio of task structure.
*/
void update_prio_tracer(pid_t tid, int prio, int policy, int kernel)
{
struct prio_tracer *pt;
struct prio_set *ps, *ps_latest;
unsigned long flags;
if (!pts_enable) return;
pt = query_prio_tracer(tid);
if (!pt) return;
spin_lock_irqsave(&pts_lock, flags);
ps = select_set(pt, 1, kernel);
ps->prio = prio;
ps->policy = policy;
ps_latest = select_set(pt, 0, kernel);
if (ps_latest->prio != prio || ps_latest->policy != policy)
kernel ? pt->change_ker++ : pt->change_usr++;
kernel ? pt->count_ker++ : pt->count_usr++;
/* binder priority inherit */
if (kernel == 2)
pt->prio_binder = prio;
spin_unlock_irqrestore(&pts_lock, flags);
}
void delete_prio_tracer(pid_t tid)
{
struct prio_tracer *pt = query_prio_tracer(tid);
unsigned long flags;
if (!pt) return;
debugfs_remove(pt->debugfs_entry);
spin_lock_irqsave(&pts_lock, flags);
rb_erase(&pt->rb_node, &priority_tracers);
spin_unlock_irqrestore(&pts_lock, flags);
}
void delete_prio_tracer(pid_t tid)
{
struct prio_tracer *pt;
struct dentry *d;
unsigned long flags;
spin_lock_irqsave(&pts_lock, flags);
pt = query_prio_tracer(tid);
if (!pt) {
spin_unlock_irqrestore(&pts_lock, flags);
return;
}
d = pt->debugfs_entry;
spin_unlock_irqrestore(&pts_lock, flags);
/* debugfs involves mutex... */
debugfs_remove(d);
spin_lock_irqsave(&pts_lock, flags);
rb_erase(&pt->rb_node, &priority_tracers);
kfree(pt);
spin_unlock_irqrestore(&pts_lock, flags);
}
