From 42fb3bd9b03cad823ae7296e24de8cedd919e813 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Mon, 20 Dec 2010 14:28:02 +0000
Subject: [PATCH] --- yaml --- r: 225895 b: refs/heads/master c:
 10034aabca9032246762daaca3152f3e79380ea0 h: refs/heads/master i:   225893:
 a8c70d7e2ea2f74badc0c0701ea4c15a462de0fe   225891:
 26c06a65476d949f79f02189ced959cf65942190   225887:
 e5b463ea02709d736f53bb0939c15a8e718469ac v: v3

---
 [refs]                                  |  2 +-
 trunk/arch/arm/include/asm/localtimer.h | 12 ------------
 trunk/arch/arm/include/asm/smp_twd.h    |  1 -
 trunk/arch/arm/kernel/smp.c             | 19 ++++++++++++++++++-
 trunk/arch/arm/kernel/smp_twd.c         | 10 ----------
 5 files changed, 19 insertions(+), 25 deletions(-)

diff --git a/[refs] b/[refs]
index 2272d886d866..ba47b47c5757 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e3d9c625f5e4158014e041f492b46e38ad10987e
+refs/heads/master: 10034aabca9032246762daaca3152f3e79380ea0
diff --git a/trunk/arch/arm/include/asm/localtimer.h b/trunk/arch/arm/include/asm/localtimer.h
index 50c7e7cfd670..6bc63ab498ce 100644
--- a/trunk/arch/arm/include/asm/localtimer.h
+++ b/trunk/arch/arm/include/asm/localtimer.h
@@ -30,7 +30,6 @@ asmlinkage void do_local_timer(struct pt_regs *);
 #include "smp_twd.h"
 
 #define local_timer_ack()	twd_timer_ack()
-#define local_timer_stop()	twd_timer_stop()
 
 #else
 
@@ -40,11 +39,6 @@ asmlinkage void do_local_timer(struct pt_regs *);
  */
 int local_timer_ack(void);
 
-/*
- * Stop a local timer interrupt.
- */
-void local_timer_stop(void);
-
 #endif
 
 /*
@@ -52,12 +46,6 @@ void local_timer_stop(void);
  */
 void local_timer_setup(struct clock_event_device *);
 
-#else
-
-static inline void local_timer_stop(void)
-{
-}
-
 #endif
 
 #endif
diff --git a/trunk/arch/arm/include/asm/smp_twd.h b/trunk/arch/arm/include/asm/smp_twd.h
index 634f357be6bb..fed9981fba08 100644
--- a/trunk/arch/arm/include/asm/smp_twd.h
+++ b/trunk/arch/arm/include/asm/smp_twd.h
@@ -22,7 +22,6 @@ struct clock_event_device;
 
 extern void __iomem *twd_base;
 
-void twd_timer_stop(void);
 int twd_timer_ack(void);
 void twd_timer_setup(struct clock_event_device *);
 
diff --git a/trunk/arch/arm/kernel/smp.c b/trunk/arch/arm/kernel/smp.c
index 6afaf6f73069..4dc864ef9cdf 100644
--- a/trunk/arch/arm/kernel/smp.c
+++ b/trunk/arch/arm/kernel/smp.c
@@ -189,6 +189,8 @@ int __cpuinit __cpu_up(unsigned int cpu)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
+static void percpu_timer_stop(void);
+
 /*
  * __cpu_disable runs on the processor to be shutdown.
  */
@@ -216,7 +218,7 @@ int __cpu_disable(void)
 	/*
 	 * Stop the local timer for this CPU.
 	 */
-	local_timer_stop();
+	percpu_timer_stop();
 
 	/*
 	 * Flush user cache and TLB mappings, and then remove this CPU
@@ -539,6 +541,21 @@ void __cpuinit percpu_timer_setup(void)
 	local_timer_setup(evt);
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * The generic clock events code purposely does not stop the local timer
+ * on CPU_DEAD/CPU_DEAD_FROZEN hotplug events, so we have to do it
+ * manually here.
+ */
+static void percpu_timer_stop(void)
+{
+	unsigned int cpu = smp_processor_id();
+	struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
+
+	evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
+}
+#endif
+
 static DEFINE_SPINLOCK(stop_lock);
 
 /*
diff --git a/trunk/arch/arm/kernel/smp_twd.c b/trunk/arch/arm/kernel/smp_twd.c
index 35882fbf37f9..24585d97c104 100644
--- a/trunk/arch/arm/kernel/smp_twd.c
+++ b/trunk/arch/arm/kernel/smp_twd.c
@@ -150,13 +150,3 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
 
 	clockevents_register_device(clk);
 }
-
-#ifdef CONFIG_HOTPLUG_CPU
-/*
- * take a local timer down
- */
-void twd_timer_stop(void)
-{
-	__raw_writel(0, twd_base + TWD_TIMER_CONTROL);
-}
-#endif