X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Fkref.c;h=9ecd6e86561034f2a097bcc027765704e124f7df;hb=765426e8ee4c0ab2bc9d44951f4865b8494cdbd0;hp=0d07cc31c818108a5d9e3bc26444957108bad721;hpb=274ec7a8c07036bd02e8f2301456e443ef30b8a8;p=linux-2.6-omap-h63xx.git

diff --git a/lib/kref.c b/lib/kref.c
index 0d07cc31c81..9ecd6e86561 100644
--- a/lib/kref.c
+++ b/lib/kref.c
@@ -14,13 +14,24 @@
 #include <linux/kref.h>
 #include <linux/module.h>
 
+/**
+ * kref_set - initialize object and set refcount to requested number.
+ * @kref: object in question.
+ * @num: initial reference counter
+ */
+void kref_set(struct kref *kref, int num)
+{
+	atomic_set(&kref->refcount, num);
+	smp_mb();
+}
+
 /**
  * kref_init - initialize object.
  * @kref: object in question.
  */
 void kref_init(struct kref *kref)
 {
-	atomic_set(&kref->refcount,1);
+	kref_set(kref, 1);
 }
 
 /**
@@ -31,6 +42,7 @@ void kref_get(struct kref *kref)
 {
 	WARN_ON(!atomic_read(&kref->refcount));
 	atomic_inc(&kref->refcount);
+	smp_mb__after_atomic_inc();
 }
 
 /**
@@ -59,6 +71,7 @@ int kref_put(struct kref *kref, void (*release)(struct kref *kref))
 	return 0;
 }
 
+EXPORT_SYMBOL(kref_set);
 EXPORT_SYMBOL(kref_init);
 EXPORT_SYMBOL(kref_get);
 EXPORT_SYMBOL(kref_put);