51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_RISCV_SPINLOCK_H
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#define __ASM_RISCV_SPINLOCK_H
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#ifdef CONFIG_QUEUED_SPINLOCKS
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#define _Q_PENDING_LOOPS (1 << 9)
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#endif
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#ifdef CONFIG_RISCV_COMBO_SPINLOCKS
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#define __no_arch_spinlock_redefine
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#include <asm/ticket_spinlock.h>
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#include <asm/qspinlock.h>
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#include <asm/jump_label.h>
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/*
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* TODO: Use an alternative instead of a static key when we are able to parse
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* the extensions string earlier in the boot process.
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*/
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DECLARE_STATIC_KEY_TRUE(qspinlock_key);
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#define SPINLOCK_BASE_DECLARE(op, type, type_lock) \
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static __always_inline type arch_spin_##op(type_lock lock) \
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{ \
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if (static_branch_unlikely(&qspinlock_key)) \
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return queued_spin_##op(lock); \
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return ticket_spin_##op(lock); \
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}
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SPINLOCK_BASE_DECLARE(lock, void, arch_spinlock_t *)
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SPINLOCK_BASE_DECLARE(unlock, void, arch_spinlock_t *)
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SPINLOCK_BASE_DECLARE(is_locked, int, arch_spinlock_t *)
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SPINLOCK_BASE_DECLARE(is_contended, int, arch_spinlock_t *)
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SPINLOCK_BASE_DECLARE(trylock, bool, arch_spinlock_t *)
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SPINLOCK_BASE_DECLARE(value_unlocked, int, arch_spinlock_t)
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#elif defined(CONFIG_RISCV_QUEUED_SPINLOCKS)
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#include <asm/qspinlock.h>
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#else
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#include <asm/ticket_spinlock.h>
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#endif
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#include <asm/qrwlock.h>
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#endif /* __ASM_RISCV_SPINLOCK_H */
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