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Subject[PATCH V2 1/3] sched: Remove cpu parameter for idle_balance()
Date
The cpu parameter passed to idle_balance is not needed as it could
be retrieved from the struct rq.

Cc: alex.shi@linaro.org
Cc: peterz@infradead.org
Cc: mingo@kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
---
kernel/sched/core.c | 2 +-
kernel/sched/fair.c | 3 ++-
kernel/sched/sched.h | 4 ++--
3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 210a12a..16b97dd 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2705,7 +2705,7 @@ need_resched:
pre_schedule(rq, prev);

if (unlikely(!rq->nr_running))
- idle_balance(cpu, rq);
+ idle_balance(rq);

put_prev_task(rq, prev);
next = pick_next_task(rq);
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4caa803..428bc9d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6531,12 +6531,13 @@ out:
* idle_balance is called by schedule() if this_cpu is about to become
* idle. Attempts to pull tasks from other CPUs.
*/
-void idle_balance(int this_cpu, struct rq *this_rq)
+void idle_balance(struct rq *this_rq)
{
struct sched_domain *sd;
int pulled_task = 0;
unsigned long next_balance = jiffies + HZ;
u64 curr_cost = 0;
+ int this_cpu = this_rq->cpu;

this_rq->idle_stamp = rq_clock(this_rq);

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index c2119fd..1436219 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1176,14 +1176,14 @@ extern const struct sched_class idle_sched_class;
extern void update_group_power(struct sched_domain *sd, int cpu);

extern void trigger_load_balance(struct rq *rq);
-extern void idle_balance(int this_cpu, struct rq *this_rq);
+extern void idle_balance(struct rq *this_rq);

extern void idle_enter_fair(struct rq *this_rq);
extern void idle_exit_fair(struct rq *this_rq);

#else /* CONFIG_SMP */

-static inline void idle_balance(int cpu, struct rq *rq)
+static inline void idle_balance(struct rq *rq)
{
}

--
1.7.9.5


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