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authorRoland McGrath <roland@hack.frob.com>2014-10-17 14:30:16 -0700
committerRoland McGrath <roland@hack.frob.com>2014-10-17 14:30:16 -0700
commit184ee94010786a9e0952aff3af39eba1d72287d3 (patch)
treeb7f4a680b4340f565951a599a6d86f88e61a1711 /nptl/pthread_mutex_unlock.c
parent327ae2570744dabf7f065a6b529d16cc22438603 (diff)
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NPTL: Conditionalize direct futex syscall uses.
Diffstat (limited to 'nptl/pthread_mutex_unlock.c')
-rw-r--r--nptl/pthread_mutex_unlock.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c
index 95ae9337c8..8064de09c1 100644
--- a/nptl/pthread_mutex_unlock.c
+++ b/nptl/pthread_mutex_unlock.c
@@ -158,6 +158,10 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
break;
+ /* The PI support requires the Linux futex system call. If that's not
+ available, pthread_mutex_init should never have allowed the type to
+ be set. So it will get the default case for an invalid type. */
+#ifdef __NR_futex
case PTHREAD_MUTEX_PI_RECURSIVE_NP:
/* Recursive mutex. */
if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
@@ -245,6 +249,7 @@ __pthread_mutex_unlock_full (pthread_mutex_t *mutex, int decr)
THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
break;
+#endif /* __NR_futex. */
case PTHREAD_MUTEX_PP_RECURSIVE_NP:
/* Recursive mutex. */