X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Fpercpu_counter.c;h=ba6085d9c7411f33bbb6aa0077423e822ad1c3dc;hb=2ef37d3fe474b218e170010a59066e19427c9847;hp=f8a3f1a829b8a9d767bed39c5138c7015380196b;hpb=62d7a2927f99be77cfb0ad2ef778bf12ced01193;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index f8a3f1a..ba6085d 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -12,7 +12,7 @@
 
 #ifdef CONFIG_HOTPLUG_CPU
 static LIST_HEAD(percpu_counters);
-static DEFINE_MUTEX(percpu_counters_lock);
+static DEFINE_SPINLOCK(percpu_counters_lock);
 #endif
 
 #ifdef CONFIG_DEBUG_OBJECTS_PERCPU_COUNTER
@@ -123,9 +123,9 @@ int __percpu_counter_init(struct percpu_counter *fbc, s64 amount,
 
 #ifdef CONFIG_HOTPLUG_CPU
 	INIT_LIST_HEAD(&fbc->list);
-	mutex_lock(&percpu_counters_lock);
+	spin_lock(&percpu_counters_lock);
 	list_add(&fbc->list, &percpu_counters);
-	mutex_unlock(&percpu_counters_lock);
+	spin_unlock(&percpu_counters_lock);
 #endif
 	return 0;
 }
@@ -139,9 +139,9 @@ void percpu_counter_destroy(struct percpu_counter *fbc)
 	debug_percpu_counter_deactivate(fbc);
 
 #ifdef CONFIG_HOTPLUG_CPU
-	mutex_lock(&percpu_counters_lock);
+	spin_lock(&percpu_counters_lock);
 	list_del(&fbc->list);
-	mutex_unlock(&percpu_counters_lock);
+	spin_unlock(&percpu_counters_lock);
 #endif
 	free_percpu(fbc->counters);
 	fbc->counters = NULL;
@@ -170,7 +170,7 @@ static int __cpuinit percpu_counter_hotcpu_callback(struct notifier_block *nb,
 		return NOTIFY_OK;
 
 	cpu = (unsigned long)hcpu;
-	mutex_lock(&percpu_counters_lock);
+	spin_lock(&percpu_counters_lock);
 	list_for_each_entry(fbc, &percpu_counters, list) {
 		s32 *pcount;
 		unsigned long flags;
@@ -181,7 +181,7 @@ static int __cpuinit percpu_counter_hotcpu_callback(struct notifier_block *nb,
 		*pcount = 0;
 		raw_spin_unlock_irqrestore(&fbc->lock, flags);
 	}
-	mutex_unlock(&percpu_counters_lock);
+	spin_unlock(&percpu_counters_lock);
 #endif
 	return NOTIFY_OK;
 }