diff options
| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2010-10-20 16:01:12 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-23 17:56:48 +0200 |
| commit | fe7de49f9d4e53f24ec9ef762a503f70b562341c (patch) | |
| tree | 766b012c7199f12625bc909748175d9e37b0b87d /kernel | |
| parent | d4429f608abde89e8bc1e24b43cd503feb95c496 (diff) | |
sched: Make sched_param argument static in sched_setscheduler() callers
Andrew Morton pointed out almost all sched_setscheduler() callers are
using fixed parameters and can be converted to static. It reduces runtime
memory use a little.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: James Morris <jmorris@namei.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/manage.c | 4 | ||||
| -rw-r--r-- | kernel/kthread.c | 2 | ||||
| -rw-r--r-- | kernel/sched.c | 6 | ||||
| -rw-r--r-- | kernel/softirq.c | 4 | ||||
| -rw-r--r-- | kernel/trace/trace_selftest.c | 2 | ||||
| -rw-r--r-- | kernel/watchdog.c | 2 |
6 files changed, 12 insertions, 8 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 644e8d5fa367..850f030fa0c2 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -573,7 +573,9 @@ irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action) { } */ static int irq_thread(void *data) { - struct sched_param param = { .sched_priority = MAX_USER_RT_PRIO/2, }; + static struct sched_param param = { + .sched_priority = MAX_USER_RT_PRIO/2, + }; struct irqaction *action = data; struct irq_desc *desc = irq_to_desc(action->irq); int wake, oneshot = desc->status & IRQ_ONESHOT; diff --git a/kernel/kthread.c b/kernel/kthread.c index 2dc3786349d1..74cf6f5e7ade 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -148,7 +148,7 @@ struct task_struct *kthread_create(int (*threadfn)(void *data), wait_for_completion(&create.done); if (!IS_ERR(create.result)) { - struct sched_param param = { .sched_priority = 0 }; + static struct sched_param param = { .sched_priority = 0 }; va_list args; va_start(args, namefmt); diff --git a/kernel/sched.c b/kernel/sched.c index d42992bccdfa..51944e8c38a8 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4701,7 +4701,7 @@ static bool check_same_owner(struct task_struct *p) } static int __sched_setscheduler(struct task_struct *p, int policy, - struct sched_param *param, bool user) + const struct sched_param *param, bool user) { int retval, oldprio, oldpolicy = -1, on_rq, running; unsigned long flags; @@ -4856,7 +4856,7 @@ recheck: * NOTE that the task may be already dead. */ int sched_setscheduler(struct task_struct *p, int policy, - struct sched_param *param) + const struct sched_param *param) { return __sched_setscheduler(p, policy, param, true); } @@ -4874,7 +4874,7 @@ EXPORT_SYMBOL_GPL(sched_setscheduler); * but our caller might not have that capability. */ int sched_setscheduler_nocheck(struct task_struct *p, int policy, - struct sched_param *param) + const struct sched_param *param) { return __sched_setscheduler(p, policy, param, false); } diff --git a/kernel/softirq.c b/kernel/softirq.c index fc978889b194..081869ed3a9f 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -851,7 +851,9 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb, cpumask_any(cpu_online_mask)); case CPU_DEAD: case CPU_DEAD_FROZEN: { - struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; + static struct sched_param param = { + .sched_priority = MAX_RT_PRIO-1 + }; p = per_cpu(ksoftirqd, hotcpu); per_cpu(ksoftirqd, hotcpu) = NULL; diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c index 155a415b3209..562c56e048fd 100644 --- a/kernel/trace/trace_selftest.c +++ b/kernel/trace/trace_selftest.c @@ -558,7 +558,7 @@ trace_selftest_startup_nop(struct tracer *trace, struct trace_array *tr) static int trace_wakeup_test_thread(void *data) { /* Make this a RT thread, doesn't need to be too high */ - struct sched_param param = { .sched_priority = 5 }; + static struct sched_param param = { .sched_priority = 5 }; struct completion *x = data; sched_setscheduler(current, SCHED_FIFO, ¶m); diff --git a/kernel/watchdog.c b/kernel/watchdog.c index bafba687a6d8..94ca779aa9c2 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -307,7 +307,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer) */ static int watchdog(void *unused) { - struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; + static struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 }; struct hrtimer *hrtimer = &__raw_get_cpu_var(watchdog_hrtimer); sched_setscheduler(current, SCHED_FIFO, ¶m); |