nptl: Move rwlock functions with forwarders into libc

The forwarders were only used internally, so new symbol versions
are needed.  All symbols are moved at once because the forwarders
are no-ops if libpthread is not loaded, leading to inconsistencies
in case of a partial migration.

The symbols __pthread_rwlock_rdlock, __pthread_rwlock_unlock,
__pthread_rwlock_wrlock, pthread_rwlock_rdlock,
pthread_rwlock_unlock, pthread_rwlock_wrlock have been moved using
scripts/move-symbol-to-libc.py.

The __ symbol variants are turned into compat symbols, which is why they
do not receive a GLIBC_2.34 version.

70 files changed, 350 insertions, 216 deletions

diff --git a/nptl/Makefile b/nptl/Makefile
index df3423f5bf..db1b2aad08 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -85,6 +85,9 @@ routines = \
   pthread_kill \
   pthread_mutex_consistent \
   pthread_once \
+  pthread_rwlock_rdlock \
+  pthread_rwlock_unlock \
+  pthread_rwlock_wrlock \
   pthread_self \
   pthread_setcancelstate \
   pthread_setcanceltype \
@@ -174,13 +177,10 @@ libpthread-routines = \
   pthread_rwlock_clockwrlock \
   pthread_rwlock_destroy \
   pthread_rwlock_init \
-  pthread_rwlock_rdlock \
   pthread_rwlock_timedrdlock \
   pthread_rwlock_timedwrlock \
   pthread_rwlock_tryrdlock \
   pthread_rwlock_trywrlock \
-  pthread_rwlock_unlock \
-  pthread_rwlock_wrlock \
   pthread_rwlockattr_destroy \
   pthread_rwlockattr_getkind_np \
   pthread_rwlockattr_getpshared \
diff --git a/nptl/Versions b/nptl/Versions
index d32b554c05..b14f76aa41 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -49,6 +49,14 @@ libc {
   }
   GLIBC_2.1 {
     pthread_attr_init;
+    pthread_rwlock_rdlock;
+    pthread_rwlock_unlock;
+    pthread_rwlock_wrlock;
+  }
+  GLIBC_2.2 {
+    __pthread_rwlock_rdlock;
+    __pthread_rwlock_unlock;
+    __pthread_rwlock_wrlock;
   }
   GLIBC_2.2.3 {
     pthread_getattr_np;
@@ -104,6 +112,9 @@ libc {
     pthread_kill;
     pthread_mutex_consistent;
     pthread_once;
+    pthread_rwlock_rdlock;
+    pthread_rwlock_unlock;
+    pthread_rwlock_wrlock;
     pthread_setspecific;
   }
   GLIBC_PRIVATE {
@@ -205,11 +216,8 @@ libpthread {
     pthread_mutexattr_settype;
     pthread_rwlock_destroy;
     pthread_rwlock_init;
-    pthread_rwlock_rdlock;
     pthread_rwlock_tryrdlock;
     pthread_rwlock_trywrlock;
-    pthread_rwlock_unlock;
-    pthread_rwlock_wrlock;
     pthread_rwlockattr_destroy;
     pthread_rwlockattr_getkind_np;
     pthread_rwlockattr_getpshared;
@@ -238,11 +246,8 @@ libpthread {
   GLIBC_2.2 {
     __pthread_rwlock_destroy;
     __pthread_rwlock_init;
-    __pthread_rwlock_rdlock;
     __pthread_rwlock_tryrdlock;
     __pthread_rwlock_trywrlock;
-    __pthread_rwlock_unlock;
-    __pthread_rwlock_wrlock;
     __res_state;
     pthread_attr_getstack;
     pthread_attr_setstack;
diff --git a/nptl/nptl-init.c b/nptl/nptl-init.c
index 1e57ff20d0..fae0db383c 100644
--- a/nptl/nptl-init.c
+++ b/nptl/nptl-init.c
@@ -66,9 +66,6 @@ static const struct pthread_functions pthread_functions =
     .ptr_pthread_mutex_init = __pthread_mutex_init,
     .ptr_pthread_mutex_lock = __pthread_mutex_lock,
     .ptr_pthread_mutex_unlock = __pthread_mutex_unlock,
-    .ptr___pthread_rwlock_rdlock = __pthread_rwlock_rdlock,
-    .ptr___pthread_rwlock_wrlock = __pthread_rwlock_wrlock,
-    .ptr___pthread_rwlock_unlock = __pthread_rwlock_unlock,
     .ptr__nptl_setxid = __nptl_setxid,
   };
 # define ptr_pthread_functions &pthread_functions
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index f09757bb26..2c59a1dc84 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -447,8 +447,10 @@ extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
 				  __attr);
 extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock);
 extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock);
+libc_hidden_proto (__pthread_rwlock_rdlock)
 extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock);
 extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock);
+libc_hidden_proto (__pthread_rwlock_wrlock)
 extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock);
 extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock);
 extern int __pthread_cond_broadcast (pthread_cond_t *cond);
@@ -559,8 +561,6 @@ hidden_proto (__pthread_mutex_destroy)
 hidden_proto (__pthread_mutex_lock)
 hidden_proto (__pthread_mutex_trylock)
 hidden_proto (__pthread_mutex_unlock)
-hidden_proto (__pthread_rwlock_rdlock)
-hidden_proto (__pthread_rwlock_wrlock)
 hidden_proto (__pthread_rwlock_unlock)
 hidden_proto (__pthread_testcancel)
 hidden_proto (__pthread_mutexattr_init)
diff --git a/nptl/pthread_rwlock_rdlock.c b/nptl/pthread_rwlock_rdlock.c
index 0eeee50834..366883ea3d 100644
--- a/nptl/pthread_rwlock_rdlock.c
+++ b/nptl/pthread_rwlock_rdlock.c
@@ -20,7 +20,7 @@