[glibc] hurd _Fork: Drop duplicate malloc_fork_lock calls

[Samuel Thibault <sthibaul@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=83b7008e11f6d149f1926970b7c21cc50ce536ed

commit 83b7008e11f6d149f1926970b7c21cc50ce536ed
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Sun Jul 11 17:51:12 2021 +0000

    hurd _Fork: Drop duplicate malloc_fork_lock calls
    
    This was put in __libc_fork by c32c868ab8b2 ("posix: Add _Fork [BZ #4737]")
    so we need to avoid locking them again in _Fork called by __libc_lock, otherwise
    we deadlock.

Diff:
---
 sysdeps/mach/hurd/_Fork.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/sysdeps/mach/hurd/_Fork.c b/sysdeps/mach/hurd/_Fork.c
index df4ee05faa..75d45d6cad 100644
--- a/sysdeps/mach/hurd/_Fork.c
+++ b/sysdeps/mach/hurd/_Fork.c
@@ -119,7 +119,6 @@ retry:
 	 handlers may use malloc, and the libio list lock has an
 	 indirect malloc dependency as well (via the getdelim
 	 function).  */
-      call_function_static_weak (__malloc_fork_lock_parent);
       _hurd_malloc_fork_prepare ();
 
       newtask = MACH_PORT_NULL;
@@ -588,7 +587,6 @@ retry:
 
       /* Release malloc locks.  */
       _hurd_malloc_fork_parent ();
-      call_function_static_weak (__malloc_fork_unlock_parent);
 
       /* Run things that want to run in the parent to restore it to
 	 normality.  Usually prepare hooks and parent hooks are
@@ -662,7 +660,6 @@ retry:
 
       /* Release malloc locks.  */
       _hurd_malloc_fork_child ();
-      call_function_static_weak (__malloc_fork_unlock_child);
 
       /* Run things that want to run in the child task to set up.  */
       RUN_HOOK (_hurd_fork_child_hook, ());