X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fkernel%2Flocking%2Frtmutex_common.h;fp=kernel%2Fkernel%2Flocking%2Frtmutex_common.h;h=f457c7574920f7c0f91324057e5bc5641b66cf09;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=289f062f26cda2f1a54bc903758e2afbc86b182b;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/kernel/locking/rtmutex_common.h b/kernel/kernel/locking/rtmutex_common.h
index 289f062f2..f457c7574 100644
--- a/kernel/kernel/locking/rtmutex_common.h
+++ b/kernel/kernel/locking/rtmutex_common.h
@@ -76,8 +76,9 @@ task_top_pi_waiter(struct task_struct *p)
 
 static inline struct task_struct *rt_mutex_owner(struct rt_mutex *lock)
 {
-	return (struct task_struct *)
-		((unsigned long)lock->owner & ~RT_MUTEX_OWNER_MASKALL);
+	unsigned long owner = (unsigned long) READ_ONCE(lock->owner);
+
+	return (struct task_struct *) (owner & ~RT_MUTEX_OWNER_MASKALL);
 }
 
 /*