1 files changed, 6 insertions, 14 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
index 47174700d0..b30659fe90 100644
--- a/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
+++ b/nptl/sysdeps/unix/sysv/linux/ia64/lowlevellock.h
@@ -127,10 +127,8 @@ static inline void
 __attribute__ ((always_inline))
 __lll_mutex_lock (int *futex)
 {
-  int val = atomic_exchange_and_add (futex, 1);
-
-  if (__builtin_expect (val != 0, 0))
-    __lll_lock_wait (futex, val);
+  if (atomic_compare_and_exchange_bool_acq (futex, 1, 0) != 0)
+    __lll_lock_wait (futex);
 }
 #define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
 
@@ -139,13 +137,8 @@ static inline void
 __attribute__ ((always_inline))
 __lll_mutex_cond_lock (int *futex)
 {
-  int val = atomic_exchange_and_add (futex, 2);
-
-  if (__builtin_expect (val != 0, 0))
-    /* Note, the val + 1 is kind of ugly here.  __lll_lock_wait will add
-       1 again.  But we added 2 to the futex value so this is the right
-       value which will be passed to the kernel.  */
-    __lll_lock_wait (futex, val + 1);
+  if (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0)
+    __lll_lock_wait (futex);
 }
 #define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex))
 
@@ -158,11 +151,10 @@ static inline int
 __attribute__ ((always_inline))
 __lll_mutex_timedlock (int *futex, const struct timespec *abstime)
 {
-  int val = atomic_exchange_and_add (futex, 1);
   int result = 0;
 
-  if (__builtin_expect (val != 0, 0))
-    result = __lll_timedlock_wait (futex, val, abstime);
+  if (atomic_compare_and_exchange_bool_acq (futex, 1, 0) != 0)
+    result = __lll_timedlock_wait (futex, abstime);
 
   return result;
 }