nptl: Wire up __nptl_arch_thread_init

nptl/pthread_create.c

@@ -38,6 +38,7 @@
 #include <version.h>
 #include <clone_internal.h>
 #include <futex-internal.h>
+#include <nptl_arch_thread_init.h>
 
 #include <shlib-compat.h>
 
@@ -363,6 +364,8 @@ start_thread (void *arg)
 	goto out;
     }
 
+  __nptl_arch_thread_init ();
+
   /* Initialize resolver state pointer.  */
   __resp = &pd->res;
 

sysdeps/nptl/nptl_arch_thread_init.h

@@ -0,0 +1,24 @@
+/* Architecture-specific thread initialization for NPTL.  Generic version.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* This is called on the new thread very early, when signals are still
+   disabled.  The generic version does nothing.  */
+static inline void
+__nptl_arch_thread_init (void)
+{
+}