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sched: clean up the rt priority macros

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clean up the rt priority macros, pointed out by Andrew Morton.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2007-07-09 18:51:59 +02:00
parent 138a8aeb5b
commit e05606d330
3 changed files with 54 additions and 31 deletions
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22
kernel/sched.c
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@ -220,6 +220,18 @@ static inline unsigned int task_timeslice(struct task_struct *p)
return static_prio_timeslice(p->static_prio);
}
static inline int rt_policy(int policy)
{
if (unlikely(policy == SCHED_FIFO) || unlikely(policy == SCHED_RR))
return 1;
return 0;
}
static inline int task_has_rt_policy(struct task_struct *p)
{
return rt_policy(p->policy);
}
/*
* This is the priority-queue data structure of the RT scheduling class:
*/
@ -698,7 +710,7 @@ static inline int __normal_prio(struct task_struct *p)
static void set_load_weight(struct task_struct *p)
{
if (has_rt_policy(p)) {
if (task_has_rt_policy(p)) {
#ifdef CONFIG_SMP
if (p == task_rq(p)->migration_thread)
/*
@ -749,7 +761,7 @@ static inline int normal_prio(struct task_struct *p)
{
int prio;
if (has_rt_policy(p))
if (task_has_rt_policy(p))
prio = MAX_RT_PRIO-1 - p->rt_priority;
else
prio = __normal_prio(p);
@ -4051,7 +4063,7 @@ void set_user_nice(struct task_struct *p, long nice)
* it wont have any effect on scheduling until the task is
* not SCHED_NORMAL/SCHED_BATCH:
*/
if (has_rt_policy(p)) {
if (task_has_rt_policy(p)) {
p->static_prio = NICE_TO_PRIO(nice);
goto out_unlock;
}
@ -4240,14 +4252,14 @@ recheck:
(p->mm && param->sched_priority > MAX_USER_RT_PRIO-1) ||
(!p->mm && param->sched_priority > MAX_RT_PRIO-1))
return -EINVAL;
if (is_rt_policy(policy) != (param->sched_priority != 0))
if (rt_policy(policy) != (param->sched_priority != 0))
return -EINVAL;
/*
* Allow unprivileged RT tasks to decrease priority:
*/
if (!capable(CAP_SYS_NICE)) {
if (is_rt_policy(policy)) {
if (rt_policy(policy)) {
unsigned long rlim_rtprio;
unsigned long flags;