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m68k: Consolidade atomic-machine.h and Remove ununsed atomic macros

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Both m68k and m68k-colfire do not support 64 bit atomis.  The
atomic_barrier syscall on m68k is a no-op, so it can use the compiler
builtin.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
This commit is contained in:
Adhemerval Zanella
2025-09-11 10:49:37 -03:00
parent 6322a325fc
commit 3642bf4800
3 changed files with 8 additions and 62 deletions
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13
sysdeps/m68k/coldfire/atomic-machine.h → sysdeps/m68k/atomic-machine.h
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@@ -15,14 +15,17 @@
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#ifndef _ATOMIC_MACHINE_H
#define _ATOMIC_MACHINE_H 1
#ifndef _M68K_ATOMIC_MACHINE_H
#define _M68K_ATOMIC_MACHINE_H 1
#if defined __mc68020__ || defined __mcoldfire__
/* If we have just non-atomic operations, we can as well make them wide. */
#define __HAVE_64B_ATOMICS 1
#define USE_ATOMIC_COMPILER_BUILTINS 1
# define __HAVE_64B_ATOMICS 0
/* XXX Is this actually correct? */
#define ATOMIC_EXCHANGE_USES_CAS 1
# define ATOMIC_EXCHANGE_USES_CAS 1
#else
# error "ISAs does not support atomic operations"
#endif
#endif

22
sysdeps/m68k/m680x0/m68020/atomic-machine.h
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@@ -1,22 +0,0 @@
/* Copyright (C) 2003-2025 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/>. */
#define __HAVE_64B_ATOMICS 0
#define USE_ATOMIC_COMPILER_BUILTINS 1
/* XXX Is this actually correct? */
#define ATOMIC_EXCHANGE_USES_CAS 1

35
sysdeps/unix/sysv/linux/m68k/coldfire/atomic-machine.h
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@@ -1,35 +0,0 @@
/* Copyright (C) 2010-2025 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 _ATOMIC_MACHINE_H
#define _ATOMIC_MACHINE_H 1
#include <sysdep.h>
/* Coldfire has no atomic compare-and-exchange operation, but the
kernel provides userspace atomicity operations. Use them. */
#define __HAVE_64B_ATOMICS 0
#define USE_ATOMIC_COMPILER_BUILTINS 1
/* XXX Is this actually correct? */
#define ATOMIC_EXCHANGE_USES_CAS 1
# define atomic_full_barrier() \
(INTERNAL_SYSCALL_CALL (atomic_barrier), (void) 0)
#endif