[PATCH 1/9] sched: Remove cpu parameter for idle_balance()

Peter Zijlstra
2014-01-21T11:29:48Z

[-- Attachment #1: daniel_lezcano-1_sched-remove__cpu__parameter_for_idle_balance.patch --]
[-- Type: text/plain, Size: 1832 bytes --]

From: Daniel Lezcano <daniel.lezcano@linaro.org>

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>
Link: http://lkml.kernel.org/r/1389949444-14821-1-git-send-email-daniel.lezcano@linaro.org
---
kernel/sched/core.c | 2 +-
kernel/sched/fair.c | 3 ++-
kernel/sched/sched.h | 2 +-
3 files changed, 4 insertions(+), 3 deletions(-)

--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2680,7 +2680,7 @@ static void __sched __schedule(void)
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);
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6359,12 +6359,13 @@ static int load_balance(int this_cpu, st
* 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);

--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1176,7 +1176,7 @@ extern const struct sched_class idle_sch
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);