linux-kernel - [PATCH V2 1/3] sched: Remove cpu parameter for idle

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Date:	Thu,  6 Feb 2014 23:10:35 +0000
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	peterz@...radead.org, mingo@...nel.org
Cc:	alex.shi@...aro.org, linux-kernel@...r.kernel.org,
	linaro-kernel@...ts.linaro.org
Subject: [PATCH V2 1/3] sched: Remove cpu parameter for idle_balance()

The cpu parameter passed to idle_balance is not needed as it could
be retrieved from the struct rq.

Cc: alex.shi@...aro.org
Cc: peterz@...radead.org
Cc: mingo@...nel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Peter Zijlstra <peterz@...radead.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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