X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=lib%2Fkref.c;h=a6dc3ec328e05fc8da4d69d185d13a5758ac0464;hb=f9a14399aea13830d8af6798a53207bb0a900945;hp=4a467faf1367bb031d49eb136ac16de0551a1629;hpb=2e9abdd9bad485970b37cd53a82f92702054984c;p=powerpc.git

diff --git a/lib/kref.c b/lib/kref.c
index 4a467faf13..a6dc3ec328 100644
--- a/lib/kref.c
+++ b/lib/kref.c
@@ -21,6 +21,7 @@
 void kref_init(struct kref *kref)
 {
 	atomic_set(&kref->refcount,1);
+	smp_mb();
 }
 
 /**
@@ -31,6 +32,7 @@ void kref_get(struct kref *kref)
 {
 	WARN_ON(!atomic_read(&kref->refcount));
 	atomic_inc(&kref->refcount);
+	smp_mb__after_atomic_inc();
 }
 
 /**
@@ -52,12 +54,7 @@ int kref_put(struct kref *kref, void (*release)(struct kref *kref))
 	WARN_ON(release == NULL);
 	WARN_ON(release == (void (*)(struct kref *))kfree);
 
-	/*
-	 * if current count is one, we are the last user and can release object
-	 * right now, avoiding an atomic operation on 'refcount'
-	 */
-	if ((atomic_read(&kref->refcount) == 1) ||
-	    (atomic_dec_and_test(&kref->refcount))) {
+	if (atomic_dec_and_test(&kref->refcount)) {
 		release(kref);
 		return 1;
 	}