Commit 3a5c359a authored by Andi Kleen's avatar Andi Kleen Committed by Ingo Molnar

sched: cleanup: remove unnecessary gotos

Replace loops implemented with gotos with real loops.
Replace err = ...; goto x; x: return err; with return ...;

No functional changes.
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d274a4ce
......@@ -562,16 +562,13 @@ static inline void finish_lock_switch(struct rq *rq, struct task_struct *prev)
static inline struct rq *__task_rq_lock(struct task_struct *p)
__acquires(rq->lock)
{
struct rq *rq;
repeat_lock_task:
rq = task_rq(p);
for (;;) {
struct rq *rq = task_rq(p);
spin_lock(&rq->lock);
if (unlikely(rq != task_rq(p))) {
if (likely(rq == task_rq(p)))
return rq;
spin_unlock(&rq->lock);
goto repeat_lock_task;
}
return rq;
}
/*
......@@ -584,15 +581,14 @@ static struct rq *task_rq_lock(struct task_struct *p, unsigned long *flags)
{
struct rq *rq;
repeat_lock_task:
for (;;) {
local_irq_save(*flags);
rq = task_rq(p);
spin_lock(&rq->lock);
if (unlikely(rq != task_rq(p))) {
if (likely(rq == task_rq(p)))
return rq;
spin_unlock_irqrestore(&rq->lock, *flags);
goto repeat_lock_task;
}
return rq;
}
static void __task_rq_unlock(struct rq *rq)
......@@ -1083,7 +1079,7 @@ void wait_task_inactive(struct task_struct *p)
int running, on_rq;
struct rq *rq;
repeat:
for (;;) {
/*
* We do the initial early heuristics without holding
* any task-queue locks at all. We'll only try to get
......@@ -1124,7 +1120,7 @@ void wait_task_inactive(struct task_struct *p)
*/
if (unlikely(running)) {
cpu_relax();
goto repeat;
continue;
}
/*
......@@ -1138,7 +1134,7 @@ void wait_task_inactive(struct task_struct *p)
*/
if (unlikely(on_rq)) {
schedule_timeout_uninterruptible(1);
goto repeat;
continue;
}
/*
......@@ -1146,6 +1142,8 @@ void wait_task_inactive(struct task_struct *p)
* runnable, which means that it will never become
* running in the future either. We're all done!
*/
break;
}
}
/***
......@@ -1236,7 +1234,7 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
/* Skip over this group if it has no CPUs allowed */
if (!cpus_intersects(group->cpumask, p->cpus_allowed))
goto nextgroup;
continue;
local_group = cpu_isset(this_cpu, group->cpumask);
......@@ -1264,9 +1262,7 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
min_load = avg_load;
idlest = group;
}
nextgroup:
group = group->next;
} while (group != sd->groups);
} while (group = group->next, group != sd->groups);
if (!idlest || 100*this_load < imbalance*min_load)
return NULL;
......@@ -3517,8 +3513,9 @@ asmlinkage void __sched preempt_schedule(void)
if (likely(ti->preempt_count || irqs_disabled()))
return;
need_resched:
do {
add_preempt_count(PREEMPT_ACTIVE);
/*
* We keep the big kernel semaphore locked, but we
* clear ->lock_depth so that schedule() doesnt
......@@ -3534,10 +3531,12 @@ asmlinkage void __sched preempt_schedule(void)
#endif
sub_preempt_count(PREEMPT_ACTIVE);
/* we could miss a preemption opportunity between schedule and now */
/*
* Check again in case we missed a preemption opportunity
* between schedule and now.
*/
barrier();
if (unlikely(test_thread_flag(TIF_NEED_RESCHED)))
goto need_resched;
} while (unlikely(test_thread_flag(TIF_NEED_RESCHED)));
}
EXPORT_SYMBOL(preempt_schedule);
......@@ -3557,8 +3556,9 @@ asmlinkage void __sched preempt_schedule_irq(void)
/* Catch callers which need to be fixed */
BUG_ON(ti->preempt_count || !irqs_disabled());
need_resched:
do {
add_preempt_count(PREEMPT_ACTIVE);
/*
* We keep the big kernel semaphore locked, but we
* clear ->lock_depth so that schedule() doesnt
......@@ -3576,10 +3576,12 @@ asmlinkage void __sched preempt_schedule_irq(void)
#endif
sub_preempt_count(PREEMPT_ACTIVE);
/* we could miss a preemption opportunity between schedule and now */
/*
* Check again in case we missed a preemption opportunity
* between schedule and now.
*/
barrier();
if (unlikely(test_thread_flag(TIF_NEED_RESCHED)))
goto need_resched;
} while (unlikely(test_thread_flag(TIF_NEED_RESCHED)));
}
#endif /* CONFIG_PREEMPT */
......@@ -4324,10 +4326,10 @@ asmlinkage long sys_sched_setparam(pid_t pid, struct sched_param __user *param)
asmlinkage long sys_sched_getscheduler(pid_t pid)
{
struct task_struct *p;
int retval = -EINVAL;
int retval;
if (pid < 0)
goto out_nounlock;
return -EINVAL;
retval = -ESRCH;
read_lock(&tasklist_lock);
......@@ -4338,8 +4340,6 @@ asmlinkage long sys_sched_getscheduler(pid_t pid)
retval = p->policy;
}
read_unlock(&tasklist_lock);
out_nounlock:
return retval;
}
......@@ -4352,10 +4352,10 @@ asmlinkage long sys_sched_getparam(pid_t pid, struct sched_param __user *param)
{
struct sched_param lp;
struct task_struct *p;
int retval = -EINVAL;
int retval;
if (!param || pid < 0)
goto out_nounlock;
return -EINVAL;
read_lock(&tasklist_lock);
p = find_process_by_pid(pid);
......@@ -4375,7 +4375,6 @@ asmlinkage long sys_sched_getparam(pid_t pid, struct sched_param __user *param)
*/
retval = copy_to_user(param, &lp, sizeof(*param)) ? -EFAULT : 0;
out_nounlock:
return retval;
out_unlock:
......@@ -4731,11 +4730,11 @@ long sys_sched_rr_get_interval(pid_t pid, struct timespec __user *interval)
{
struct task_struct *p;
unsigned int time_slice;
int retval = -EINVAL;
int retval;
struct timespec t;
if (pid < 0)
goto out_nounlock;
return -EINVAL;
retval = -ESRCH;
read_lock(&tasklist_lock);
......@@ -4763,8 +4762,8 @@ long sys_sched_rr_get_interval(pid_t pid, struct timespec __user *interval)
read_unlock(&tasklist_lock);
jiffies_to_timespec(time_slice, &t);
retval = copy_to_user(interval, &t, sizeof(t)) ? -EFAULT : 0;
out_nounlock:
return retval;
out_unlock:
read_unlock(&tasklist_lock);
return retval;
......@@ -5070,7 +5069,7 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
struct rq *rq;
int dest_cpu;
restart:
do {
/* On same node? */
mask = node_to_cpumask(cpu_to_node(dead_cpu));
cpus_and(mask, mask, p->cpus_allowed);
......@@ -5097,8 +5096,7 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
"longer affine to cpu%d\n",
p->pid, p->comm, dead_cpu);
}
if (!__migrate_task(p, dead_cpu, dest_cpu))
goto restart;
} while (!__migrate_task(p, dead_cpu, dest_cpu));
}
/*
......@@ -5913,7 +5911,7 @@ static void init_numa_sched_groups_power(struct sched_group *group_head)
if (!sg)
return;
next_sg:
do {
for_each_cpu_mask(j, sg->cpumask) {
struct sched_domain *sd;
......@@ -5929,8 +5927,7 @@ static void init_numa_sched_groups_power(struct sched_group *group_head)
sg_inc_cpu_power(sg, sd->groups->__cpu_power);
}
sg = sg->next;
if (sg != group_head)
goto next_sg;
} while (sg != group_head);
}
#endif
......
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