linux-kernel - [PATCH 6/6] x86/x2apic_phys.c: Wakeup function in x2apic

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Date:	Mon,  4 Jun 2012 11:17:56 -0700
From:	"Fenghua Yu" <fenghua.yu@...el.com>
To:	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H Peter Anvin" <hpa@...or.com>,
	"Suresh B Siddha" <suresh.b.siddha@...el.com>,
	"Tony Luck" <tony.luck@...el.com>,
	"Asit K Mallick" <asit.k.mallick@...el.com>,
	"Arjan Dan De Ven" <arjan@...ux.intel.com>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"x86" <x86@...nel.org>, "linux-pm" <linux-pm@...r.kernel.org>,
	"Fenghua Yu" <fenghua.yu@...el.com>
Subject: [PATCH 6/6] x86/x2apic_phys.c: Wakeup function in x2apic_phys calls mwait or nmi method

 	wmb();
+	printk("%s:%d\n",__func__,__LINE__);
 	cpu_idle();
 }
 
@@ -478,6 +479,8 @@ _wakeup_secondary_cpu_via_nmi(int apicid, int dest_mode)
 	unsigned long send_status, accept_status = 0;
 	int maxlvt;
 
+	printk("%s:%d\n",__func__,__LINE__);
+
 	/* Target chip */
 	/* Boot on the stack */
 	/* Kick the second */
@@ -530,6 +533,7 @@ DEFINE_PER_CPU(int, cpu_dead) = { 0 };
 
 static int wakeup_secondary_cpu_via_mwait(int cpu)
 {
+	printk("%s:%d\n",__func__,__LINE__);
 	per_cpu(cpu_dead, cpu) |= CPU_DEAD_TRIGGER;
 	return 0;
 }
@@ -553,6 +557,7 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
 	unsigned long send_status, accept_status = 0;
 	int maxlvt, num_starts, j;
 
+	printk("%s:%d\n",__func__,__LINE__);
 	maxlvt = lapic_get_maxlvt();
 
 	/*
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 6345294..b218149 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -49,6 +49,7 @@ static ssize_t __ref store_online(struct device *dev,
 			kobject_uevent(&dev->kobj, KOBJ_OFFLINE);
 		break;
 	case '1':
+		printk("%s:%d\n",__func__,__LINE__);
 		ret = cpu_up(cpu->dev.id);
 		if (!ret)
 			kobject_uevent(&dev->kobj, KOBJ_ONLINE);
--
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