nptl: Remove ATOMIC_EXCHANGE_USES_CAS usageazanella/atomic-cleanup

The only usage was for pthread_spin_lock, introduced by 12d2dd706099aa4,
as a way to optimize the code for certain architectures. Now that atomic
builtins are used by default, let the compiler use the best code sequence
for the atomic exchange.

Co-authored-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 0 insertions, 24 deletions

diff --git a/sysdeps/csky/atomic-machine.h b/sysdeps/csky/atomic-machine.h
deleted file mode 100644
index 84468cd66e..0000000000
--- a/sysdeps/csky/atomic-machine.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Atomic operations.  C-SKY version.
-   Copyright (C) 2018-2025 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 __CSKY_ATOMIC_H_
-#define __CSKY_ATOMIC_H_
-
-#define ATOMIC_EXCHANGE_USES_CAS 1
-
-#endif /* atomic-machine.h */