[patch V3 11/64] rtmutex: Switch to try_cmpxchg()

[Thomas Gleixner]

From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Allows the compiler to generate better code depending on the architecture.

Suggested-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 kernel/locking/rtmutex.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -145,14 +145,14 @@ static __always_inline bool rt_mutex_cmp
 						     struct task_struct *old,
 						     struct task_struct *new)
 {
-	return cmpxchg_acquire(&lock->owner, old, new) == old;
+	return try_cmpxchg_acquire(&lock->owner, &old, new);
 }
 
 static __always_inline bool rt_mutex_cmpxchg_release(struct rt_mutex *lock,
 						     struct task_struct *old,
 						     struct task_struct *new)
 {
-	return cmpxchg_release(&lock->owner, old, new) == old;
+	return try_cmpxchg_release(&lock->owner, &old, new);
 }
 
 /*