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spl: remove old atomic lock

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Long ago, SPL atomics were implemented as a global spinlock over
conventional operations. In 5e9b5d832b (2009-10) they was converted to
proper atomics, with the spinlock retained as a fallback.

The switch to compile with the fallback was later removed in a91258913f
(2018-05), but the code it enabled wasn't. So lets do that.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #18117
This commit is contained in:
Rob Norris 2025-12-31 20:40:24 +11:00 committed by Brian Behlendorf
parent 2f1f25217f
commit 2ca6e880da
2 changed files with 0 additions and 37 deletions
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1
module/Kbuild.in
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@ -69,7 +69,6 @@ ccflags-$(CONFIG_SPARC64) += -Wno-unused-value
obj-$(CONFIG_ZFS) := spl.o zfs.o
SPL_OBJS := \
spl-atomic.o \
spl-condvar.o \
spl-cred.o \
spl-err.o \

36
module/os/linux/spl/spl-atomic.c
View File

@ -1,36 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
* Copyright (C) 2007 The Regents of the University of California.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
* UCRL-CODE-235197
*
* This file is part of the SPL, Solaris Porting Layer.
*
* The SPL is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* The SPL 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 General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with the SPL. If not, see <http://www.gnu.org/licenses/>.
*
* Solaris Porting Layer (SPL) Atomic Implementation.
*/
#include <sys/atomic.h>
#ifdef ATOMIC_SPINLOCK
/* Global atomic lock declarations */
DEFINE_SPINLOCK(atomic32_lock);
DEFINE_SPINLOCK(atomic64_lock);
EXPORT_SYMBOL(atomic32_lock);
EXPORT_SYMBOL(atomic64_lock);
#endif /* ATOMIC_SPINLOCK */