patches.workqueues/0003-PHYLIB-queue-work-on-system_power_efficient_wq.patch

From bbe9f36ad93d3404e4c99509f6d13aed67fce02e Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Wed, 24 Apr 2013 17:12:55 +0530
Subject: PHYLIB: queue work on system_power_efficient_wq

Phylib uses workqueues for multiple purposes. There is no real dependency of
scheduling these on the cpu which scheduled them.

On a idle system, it is observed that and idle cpu wakes up many times just to
service this work. It would be better if we can schedule it on a cpu which the
scheduler believes to be the most appropriate one.

This patch replaces system_wq with system_power_efficient_wq for PHYLIB.

Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry picked from commit bbb47bdeae756f04b896b55b51f230f3eb21f207)
Signed-off-by: Mark Brown <broonie@linaro.org>
---
 drivers/net/phy/phy.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -458,7 +458,7 @@ void phy_start_machine(struct phy_device
 {
 	phydev->adjust_state = handler;
 
-	schedule_delayed_work(&phydev->state_queue, HZ);
+	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
 }
 
 /**
@@ -519,7 +519,7 @@ static irqreturn_t phy_interrupt(int irq
 	disable_irq_nosync(irq);
 	atomic_inc(&phydev->irq_disable);
 
-	schedule_work(&phydev->phy_queue);
+	queue_work(system_power_efficient_wq, &phydev->phy_queue);
 
 	return IRQ_HANDLED;
 }
@@ -674,7 +674,7 @@ static void phy_change(struct work_struc
 
 	/* reschedule state queue work to run as soon as possible */
 	cancel_delayed_work_sync(&phydev->state_queue);
-	schedule_delayed_work(&phydev->state_queue, 0);
+	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
 
 	return;
 
@@ -937,7 +937,8 @@ void phy_state_machine(struct work_struc
 	if (err < 0)
 		phy_error(phydev);
 
-	schedule_delayed_work(&phydev->state_queue, PHY_STATE_TIME * HZ);
+	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
+			PHY_STATE_TIME * HZ);
 }
 
 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,