linux-kernel - [PATCH 2/7] sched: pass struct rq to on_null

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Message-Id: <1388411093-3413-3-git-send-email-daniel.lezcano@linaro.org>
Date:	Mon, 30 Dec 2013 14:44:48 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	mingo@...hat.com, peterz@...radead.org
Cc:	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org
Subject: [PATCH 2/7] sched: pass struct rq to on_null_domain function

The on_null_domain function is getting the cpu to retrieve the struct rq
associated with it.

Pass the struct rq directly to the function as the caller has already the info.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
---
 kernel/sched/fair.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4cb414a..82dd145 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -6861,9 +6861,9 @@ static void run_rebalance_domains(struct softirq_action *h)
 	nohz_idle_balance(this_cpu, idle);
 }
 
-static inline int on_null_domain(int cpu)
+static inline int on_null_domain(struct rq *rq)
 {
-	return !rcu_dereference_sched(cpu_rq(cpu)->sd);
+	return !rcu_dereference_sched(rq->sd);
 }
 
 /*
@@ -6875,10 +6875,10 @@ void trigger_load_balance(struct rq *rq)
 
 	/* Don't need to rebalance while attached to NULL domain */
 	if (time_after_eq(jiffies, rq->next_balance) &&
-	    likely(!on_null_domain(cpu)))
+	    likely(!on_null_domain(rq)))
 		raise_softirq(SCHED_SOFTIRQ);
 #ifdef CONFIG_NO_HZ_COMMON
-	if (nohz_kick_needed(rq) && likely(!on_null_domain(cpu)))
+	if (nohz_kick_needed(rq) && likely(!on_null_domain(rq)))
 		nohz_balancer_kick(cpu);
 #endif
 }
-- 
1.7.9.5

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