about summary refs log tree commit diff
path: root/nptl/pthread_mutex_unlock.c
diff options
context:
space:
mode:
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)
downloadglibc-184ee94010786a9e0952aff3af39eba1d72287d3.tar.gz
glibc-184ee94010786a9e0952aff3af39eba1d72287d3.tar.xz
glibc-184ee94010786a9e0952aff3af39eba1d72287d3.zip
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.  */