bb056c0f08
Convert {clear,set}_bit() to atomics as KVM's ucall implementation relies
on clear_bit() being atomic, they are defined in atomic.h, and the same
helpers in the kernel proper are atomic.
KVM's ucall infrastructure is the only user of clear_bit() in tools/, and
there are no true set_bit() users. tools/testing/nvdimm/ does make heavy
use of set_bit(), but that code builds into a kernel module of sorts, i.e.
pulls in all of the kernel's header and so is already getting the kernel's
atomic set_bit().
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221119013450.2643007-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
16 lines
481 B
C
16 lines
481 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_
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#define _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_
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#include <asm/types.h>
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#include <asm/bitsperlong.h>
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/*
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* Just alias the test versions, all of the compiler built-in atomics "fetch",
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* and optimizing compile-time constants on x86 isn't worth the complexity.
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*/
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#define set_bit test_and_set_bit
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#define clear_bit test_and_clear_bit
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#endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ */
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