[glibc/fw/libpthread-20210318b] pthread: Introduce __pthread_early_init

[glibc/fw/libpthread-20210318b] pthread: Introduce __pthread_early_init

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8b6d5298b38fb110199f1d838919dba36ba3b8bb

commit 8b6d5298b38fb110199f1d838919dba36ba3b8bb
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Mar 16 18:05:39 2021 +0100

    pthread: Introduce __pthread_early_init
    
    This function is called from __libc_early_init to initialize the
    pthread subsystem.

Diff:
---
 elf/libc_early_init.c                |  3 +++
 sysdeps/pthread/pthread_early_init.h | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/elf/libc_early_init.c b/elf/libc_early_init.c
index 9b1901a706..525edf1e7d 100644
--- a/elf/libc_early_init.c
+++ b/elf/libc_early_init.c
@@ -21,6 +21,7 @@
 #include <libc-early-init.h>
 #include <libc-internal.h>
 #include <lowlevellock.h>
+#include <pthread_early_init.h>
 #include <sys/single_threaded.h>
 
 #ifdef SHARED
@@ -40,6 +41,8 @@ __libc_early_init (_Bool initial)
   __libc_initial = initial;
 #endif
 
+  __pthread_early_init ();
+
 #if ENABLE_ELISION_SUPPORT
   __lll_elision_init ();
 #endif
diff --git a/sysdeps/pthread/pthread_early_init.h b/sysdeps/pthread/pthread_early_init.h
new file mode 100644
index 0000000000..b8bb9b762d
--- /dev/null
+++ b/sysdeps/pthread/pthread_early_init.h
@@ -0,0 +1,29 @@
+/* pthread initialization called from __libc_early_init.  Generic version.
+   Copyright (C) 2021 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/>.  */
+
+#ifndef _PTHREAD_EARLY_INIT_H
+#define _PTHREAD_EARLY_INIT_H 1
+
+static inline void
+__pthread_early_init (void)
+{
+  /* The generic version does not require any additional
+     initialization.  */
+}
+
+#endif /* _PTHREAD_EARLY_INIT_H */