nptl: Move pthread_once and __pthread_once into libc

And also the fork generation counter, __fork_generation.  This
eliminates the need for __fork_generation_pointer.

call_once remains in libpthread and calls the exported __pthread_once
symbol.

pthread_once and __pthread_once have been moved using
scripts/move-symbol-to-libc.py.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

70 files changed, 152 insertions, 94 deletions

diff --git a/nptl/Makefile b/nptl/Makefile
index b53d32eb9b..323bcc9432 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -77,6 +77,7 @@ routines = \
   pthread_getschedparam \
   pthread_kill \
   pthread_mutex_consistent \
+  pthread_once \
   pthread_self \
   pthread_setschedparam \
   pthread_sigmask \
@@ -162,7 +163,6 @@ libpthread-routines = \
   pthread_mutexattr_setpshared \
   pthread_mutexattr_setrobust \
   pthread_mutexattr_settype \
-  pthread_once \
   pthread_rwlock_clockrdlock \
   pthread_rwlock_clockwrlock \
   pthread_rwlock_destroy \
diff --git a/nptl/Versions b/nptl/Versions
index e59a11753e..1a7946cf2f 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -1,5 +1,6 @@
 libc {
   GLIBC_2.0 {
+    __pthread_once;
     _pthread_cleanup_pop;
     _pthread_cleanup_pop_restore;
     _pthread_cleanup_push;
@@ -32,6 +33,7 @@ libc {
     pthread_mutex_init;
     pthread_mutex_lock;
     pthread_mutex_unlock;
+    pthread_once;
     pthread_self;
     pthread_setcancelstate;
     pthread_setcanceltype;
@@ -84,8 +86,10 @@ libc {
   }
   GLIBC_2.34 {
     __pthread_cleanup_routine;
+    __pthread_once;
     pthread_kill;
     pthread_mutex_consistent;
+    pthread_once;
   }
   GLIBC_PRIVATE {
     __futex_abstimed_wait64;
@@ -135,7 +139,6 @@ libpthread {
     __pthread_mutexattr_destroy;
     __pthread_mutexattr_init;
     __pthread_mutexattr_settype;
-    __pthread_once;
     __pthread_setspecific;
     _exit;
     flockfile;
@@ -164,7 +167,6 @@ libpthread {
     pthread_mutexattr_getkind_np;
     pthread_mutexattr_init;
     pthread_mutexattr_setkind_np;
-    pthread_once;
     pthread_setcancelstate;
     pthread_setcanceltype;
     pthread_setspecific;
diff --git a/nptl/libc_pthread_init.c b/nptl/libc_pthread_init.c
index 4de182b4e4..b67a69f9a1 100644
--- a/nptl/libc_pthread_init.c
+++ b/nptl/libc_pthread_init.c
@@ -28,9 +28,6 @@
 #include <ldsodefs.h>
 
 
-unsigned long int *__fork_generation_pointer;
-
-
 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
 void
 #else
@@ -38,12 +35,9 @@ extern int __libc_multiple_threads attribute_hidden;
 
 int *
 #endif
-__libc_pthread_init (unsigned long int *ptr, void (*reclaim) (void),
+__libc_pthread_init (void (*reclaim) (void),
 		     const struct pthread_functions *functions)
 {
-  /* Remember the pointer to the generation counter in libpthread.  */
-  __fork_generation_pointer = ptr;
-
   /* Called by a child after fork.  */
   __register_atfork (NULL, NULL, reclaim, NULL);
 
diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c
index 9decc143cb..b683adb698 100644
--- a/nptl/nptl-init.c
+++ b/nptl/nptl-init.c
@@ -87,7 +87,6 @@ static const struct pthread_functions pthread_functions =
     .ptr_pthread_mutex_unlock = __pthread_mutex_unlock,
     .ptr___pthread_setcancelstate = __pthread_setcancelstate,
     .ptr_pthread_setcanceltype = __pthread_setcanceltype,
-    .ptr___pthread_once = __pthread_once,
     .ptr___pthread_rwlock_rdlock = __pthread_rwlock_rdlock,
     .ptr___pthread_rwlock_wrlock = __pthread_rwlock_wrlock,
     .ptr___pthread_rwlock_unlock = __pthread_rwlock_unlock,
@@ -333,8 +332,7 @@ __pthread_initialize_minimal_internal (void)
 #ifndef TLS_MULTIPLE_THREADS_IN_TCB
   __libc_multiple_threads_ptr =
 #endif
-    __libc_pthread_init (&__fork_generation, __reclaim_stacks,
-			 ptr_pthread_functions);
+    __libc_pthread_init (__reclaim_stacks, ptr_pthread_functions);
 
 #if HAVE_TUNABLES
   __pthread_tunables_init ();
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index ab0e92f2ca..75fec43fed 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -361,12 +361,10 @@ extern unsigned long int *__fork_generation_pointer attribute_hidden;
 
 /* Register the generation counter in the libpthread with the libc.  */
 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
-extern void __libc_pthread_init (unsigned long int *ptr,
-				 void (*reclaim) (void),
+extern void __libc_pthread_init (void (*reclaim) (void),
 				 const struct pthread_functions *functions);
 #else
-extern int *__libc_pthread_init (unsigned long int *ptr,
-				 void (*reclaim) (void),
+extern int *__libc_pthread_init (void (*reclaim) (void),
 				 const struct pthread_functions *functions);
 
 /* Variable set to a nonzero value either if more