[glibc] nptl: Remove exit-thread.h

[glibc] nptl: Remove exit-thread.h

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=eaa53d0f77691e37aa6f22e18205a2ba019e1a1c

commit eaa53d0f77691e37aa6f22e18205a2ba019e1a1c
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Thu May 27 09:11:10 2021 -0300

    nptl: Remove exit-thread.h
    
    No function change.  The code is used only for Linux, besides
    being included in generic code.

Diff:
---
 csu/libc-start.c                      |  1 -
 nptl/pthread_create.c                 |  4 ++--
 sysdeps/generic/exit-thread.h         | 28 --------------------------
 sysdeps/nptl/libc_start_call_main.h   |  3 ++-
 sysdeps/unix/sysv/linux/exit-thread.h | 37 -----------------------------------
 5 files changed, 4 insertions(+), 69 deletions(-)

diff --git a/csu/libc-start.c b/csu/libc-start.c
index 8688cba76d..5b5913e7bf 100644
--- a/csu/libc-start.c
+++ b/csu/libc-start.c
@@ -30,7 +30,6 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <ldsodefs.h>
-#include <exit-thread.h>
 #include <libc-diag.h>
 #include <libc-internal.h>
 #include <elf/libc-early-init.h>
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index 2d2535b07d..52d6738f7f 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -30,7 +30,6 @@
 #include <libc-internal.h>
 #include <resolv.h>
 #include <kernel-features.h>
-#include <exit-thread.h>
 #include <default-sched.h>
 #include <futex-internal.h>
 #include <tls-setup.h>
@@ -575,7 +574,8 @@ start_thread (void *arg)
 
      The exit code is zero since in case all threads exit by calling
      'pthread_exit' the exit status must be 0 (zero).  */
-  __exit_thread ();
+  while (1)
+    INTERNAL_SYSCALL_CALL (exit, 0);
 
   /* NOTREACHED */
 }
diff --git a/sysdeps/generic/exit-thread.h b/sysdeps/generic/exit-thread.h
deleted file mode 100644
index 676ef553a5..0000000000
--- a/sysdeps/generic/exit-thread.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/* Call to terminate the current thread.  Stub version.
-   Copyright (C) 2014-2021 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/>.  */
-
-/* This causes the current thread to exit, without affecting other
-   threads in the process if there are any.  If there are no other
-   threads left, then this has the effect of _exit (0).  */
-
-static inline void __attribute__ ((noreturn, always_inline, unused))
-__exit_thread (void)
-{
-  while (1)
-    asm ("write me!");
-}
diff --git a/sysdeps/nptl/libc_start_call_main.h b/sysdeps/nptl/libc_start_call_main.h
index c579c65f78..b56bf34325 100644
--- a/sysdeps/nptl/libc_start_call_main.h
+++ b/sysdeps/nptl/libc_start_call_main.h
@@ -67,7 +67,8 @@ __libc_start_call_main (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
       result = 0;
       if (! atomic_decrement_and_test (&__nptl_nthreads))
         /* Not much left to do but to exit the thread, not the process.  */
-        __exit_thread ();
+	while (1)
+	  INTERNAL_SYSCALL_CALL (exit, 0);
     }
 
   exit (result);
diff --git a/sysdeps/unix/sysv/linux/exit-thread.h b/sysdeps/unix/sysv/linux/exit-thread.h
deleted file mode 100644
index 9e1b7f3752..0000000000
--- a/sysdeps/unix/sysv/linux/exit-thread.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Call to terminate the current thread.  Linux version.
-   Copyright (C) 2014-2021 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/>.  */
-
-#include <sysdep.h>
-
-/* This causes the current thread to exit, without affecting other
-   threads in the process if there are any.  If there are no other
-   threads left, then this has the effect of _exit (0).  */
-
-static inline void __attribute__ ((noreturn, always_inline, unused))
-__exit_thread (void)
-{
-  /* Doing this in a loop is mostly just to satisfy the compiler that the
-     function really qualifies as noreturn.  It also means that in some
-     pathological situation where the system call does not get made or does
-     not work, the thread will simply spin rather than running off the end
-     of the caller and doing unexpectedly strange things.  */
-  while (1)
-    {
-      INTERNAL_SYSCALL_CALL (exit, 0);
-    }
-}