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sched: Use this_rq() helper

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It is a few instructions more efficent to and slightly more
readable to use this_rq()-> instead of cpu_rq(smp_processor_id())-> .

Size comparison of kernel/sched/fair.o:

   text    data     bss     dec     hex filename
  27972     122      26   28120    6dd8 fair.o.before
  27956     122      26   28104    6dc8 fair.o.after

Signed-off-by: Nathan Zimmer <nzimmer@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1368116643-87971-1-git-send-email-nzimmer@sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Nathan Zimmer 2013-05-09 11:24:03 -05:00 committed by Ingo Molnar
parent 534c97b095
commit 424c93fe4c
2 changed files with 3 additions and 5 deletions
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6
kernel/sched/fair.c
View File

@ -5418,10 +5418,9 @@ static inline void nohz_balance_exit_idle(int cpu)
static inline void set_cpu_sd_state_busy(void) static inline void set_cpu_sd_state_busy(void)
{ {
struct sched_domain *sd; struct sched_domain *sd;
int cpu = smp_processor_id();
rcu_read_lock(); rcu_read_lock();
sd = rcu_dereference_check_sched_domain(cpu_rq(cpu)->sd); sd = rcu_dereference_check_sched_domain(this_rq()->sd);
if (!sd || !sd->nohz_idle) if (!sd || !sd->nohz_idle)
goto unlock; goto unlock;
@ -5436,10 +5435,9 @@ static inline void set_cpu_sd_state_busy(void)
void set_cpu_sd_state_idle(void) void set_cpu_sd_state_idle(void)
{ {
struct sched_domain *sd; struct sched_domain *sd;
int cpu = smp_processor_id();
rcu_read_lock(); rcu_read_lock();
sd = rcu_dereference_check_sched_domain(cpu_rq(cpu)->sd); sd = rcu_dereference_check_sched_domain(this_rq()->sd);
if (!sd || sd->nohz_idle) if (!sd || sd->nohz_idle)
goto unlock; goto unlock;

2
kernel/sched/rt.c
View File

@ -472,7 +472,7 @@ static int rt_se_boosted(struct sched_rt_entity *rt_se)
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
static inline const struct cpumask *sched_rt_period_mask(void) static inline const struct cpumask *sched_rt_period_mask(void)
{ {
return cpu_rq(smp_processor_id())->rd->span; return this_rq()->rd->span;
} }
#else #else
static inline const struct cpumask *sched_rt_period_mask(void) static inline const struct cpumask *sched_rt_period_mask(void)