nptl: Remove exit-thread.h

No function change.  The code is used only for Linux, besides
being included in generic code.

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>

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 */
 }

sysdeps/generic/exit-thread.h

@@ -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!");
-}

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);

sysdeps/unix/sysv/linux/exit-thread.h

@@ -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);
-    }
-}