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The commitf5bfdc8e39("locking/osq: Use optimized spinning loop for arm64") introduced a warning from Clang because vcpu_is_preempted() is compiled away, kernel/locking/osq_lock.c:25:19: warning: unused function 'node_cpu' [-Wunused-function] static inline int node_cpu(struct optimistic_spin_node *node) ^ 1 warning generated. Fix it by converting vcpu_is_preempted() to a static inline function. Fixes:f5bfdc8e39("locking/osq: Use optimized spinning loop for arm64") Acked-by: Waiman Long <longman@redhat.com> Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Will Deacon <will@kernel.org>
28 lines
601 B
C
28 lines
601 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2012 ARM Ltd.
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*/
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#ifndef __ASM_SPINLOCK_H
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#define __ASM_SPINLOCK_H
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#include <asm/qrwlock.h>
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#include <asm/qspinlock.h>
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/* See include/linux/spinlock.h */
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#define smp_mb__after_spinlock() smp_mb()
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/*
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* Changing this will break osq_lock() thanks to the call inside
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* smp_cond_load_relaxed().
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*
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* See:
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* https://lore.kernel.org/lkml/20200110100612.GC2827@hirez.programming.kicks-ass.net
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*/
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#define vcpu_is_preempted vcpu_is_preempted
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static inline bool vcpu_is_preempted(int cpu)
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{
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return false;
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}
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#endif /* __ASM_SPINLOCK_H */
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