1 files changed, 25 insertions, 3 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h
index 3c5a28944..459d1ca79 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sparc/bits/pthreadtypes.h
@@ -58,11 +58,25 @@ typedef union
 } pthread_attr_t;
 
 
+#if __WORDSIZE == 64
+typedef struct __pthread_internal_list
+{
+  struct __pthread_internal_list *__prev;
+  struct __pthread_internal_list *__next;
+} __pthread_list_t;
+#else
+typedef struct __pthread_internal_slist
+{
+  struct __pthread_internal_slist *__next;
+} __pthread_slist_t;
+#endif
+
+
 /* Data structures for mutex handling.  The structure of the attribute
    type is deliberately not exposed.  */
 typedef union
 {
-  struct
+  struct __pthread_mutex_s
   {
     int __lock;
     unsigned int __count;
@@ -73,10 +87,18 @@ typedef union
     /* KIND must stay at this position in the structure to maintain
        binary compatibility.  */
     int __kind;
-#if __WORDSIZE != 64
+#if __WORDSIZE == 64
+    int __spins;
+    __pthread_list_t __list;
+# define __PTHREAD_MUTEX_HAVE_PREV      1
+#else
     unsigned int __nusers;
+    __extension__ union
+    {
+      int __spins;
+      __pthread_slist_t __list;
+    };
 #endif
-    int __spins;
   } __data;
   char __size[__SIZEOF_PTHREAD_MUTEX_T];
   long int __align;