[newlib-cygwin] Remove __sinit_locks / __sinit_recursive_mutex

[Sebastian Huber <sh@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=d83aa402b7ba3e3ec16d247a26cc8343a2e7efa3

commit d83aa402b7ba3e3ec16d247a26cc8343a2e7efa3
Author: Matt Joyce <matthew.joyce@embedded-brains.de>
Date:   Fri Apr 8 11:24:38 2022 +0200

    Remove __sinit_locks / __sinit_recursive_mutex
    
    Remove __sinit_lock_acquire() and __sinit_lock_release().  Replace these with
    __sfp_lock_acquire() and __sfp_lock_release(), respectively.  This eliminates a
    potential deadlock issue between __sinit() and __sfp().  Remove now unused
    __sinit_recursive_mutex and __lock___sinit_recursive_mutex.

Diff:
---
 newlib/libc/misc/lock.c    |  4 ----
 newlib/libc/stdio/findfp.c | 19 +++----------------
 newlib/libc/stdio/local.h  |  2 --
 3 files changed, 3 insertions(+), 22 deletions(-)

diff --git a/newlib/libc/misc/lock.c b/newlib/libc/misc/lock.c
index 545511e78..c03c36a1e 100644
--- a/newlib/libc/misc/lock.c
+++ b/newlib/libc/misc/lock.c
@@ -2,8 +2,6 @@
 FUNCTION
 <<__retarget_lock_init>>, <<__retarget_lock_init_recursive>>, <<__retarget_lock_close>>, <<__retarget_lock_close_recursive>>, <<__retarget_lock_acquire>>, <<__retarget_lock_acquire_recursive>>, <<__retarget_lock_try_acquire>>, <<__retarget_lock_try_acquire_recursive>>, <<__retarget_lock_release>>, <<__retarget_lock_release_recursive>>---locking routines
 
-INDEX
-	__lock___sinit_recursive_mutex
 INDEX
 	__lock___sfp_recursive_mutex
 INDEX
@@ -44,7 +42,6 @@ INDEX
 
 SYNOPSIS
 	#include <lock.h>
-	struct __lock __lock___sinit_recursive_mutex;
 	struct __lock __lock___sfp_recursive_mutex;
 	struct __lock __lock___atexit_recursive_mutex;
 	struct __lock __lock___at_quick_exit_mutex;
@@ -92,7 +89,6 @@ struct __lock {
   char unused;
 };
 
-struct __lock __lock___sinit_recursive_mutex;
 struct __lock __lock___sfp_recursive_mutex;
 struct __lock __lock___atexit_recursive_mutex;
 struct __lock __lock___at_quick_exit_mutex;
diff --git a/newlib/libc/stdio/findfp.c b/newlib/libc/stdio/findfp.c
index 66867e664..afbdad9b1 100644
--- a/newlib/libc/stdio/findfp.c
+++ b/newlib/libc/stdio/findfp.c
@@ -235,11 +235,11 @@ cleanup_stdio (struct _reent *ptr)
 void
 __sinit (struct _reent *s)
 {
-  __sinit_lock_acquire ();
+  __sfp_lock_acquire ();
 
   if (s->__cleanup)
     {
-      __sinit_lock_release ();
+      __sfp_lock_release ();
       return;
     }
 
@@ -268,13 +268,12 @@ __sinit (struct _reent *s)
   stderr_init (s->_stderr);
 #endif /* _REENT_GLOBAL_STDIO_STREAMS */
 
-  __sinit_lock_release ();
+  __sfp_lock_release ();
 }
 
 #ifndef __SINGLE_THREAD__
 
 __LOCK_INIT_RECURSIVE(static, __sfp_recursive_mutex);
-__LOCK_INIT_RECURSIVE(static, __sinit_recursive_mutex);
 
 void
 __sfp_lock_acquire (void)
@@ -288,18 +287,6 @@ __sfp_lock_release (void)
   __lock_release_recursive (__sfp_recursive_mutex);
 }
 
-void
-__sinit_lock_acquire (void)
-{
-  __lock_acquire_recursive (__sinit_recursive_mutex);
-}
-
-void
-__sinit_lock_release (void)
-{
-  __lock_release_recursive (__sinit_recursive_mutex);
-}
-
 /* Walkable file locking routine.  */
 static int
 __fp_lock (struct _reent * ptr __unused, FILE * fp)
diff --git a/newlib/libc/stdio/local.h b/newlib/libc/stdio/local.h
index 30c534dcd..9c6f63fdb 100644
--- a/newlib/libc/stdio/local.h
+++ b/newlib/libc/stdio/local.h
@@ -287,8 +287,6 @@ char *_llicvt (char *, long long, char);
 #else
 void __sfp_lock_acquire (void);
 void __sfp_lock_release (void);
-void __sinit_lock_acquire (void);
-void __sinit_lock_release (void);
 #endif
 
 /* Types used in positional argument support in vfprinf/vfwprintf.