43 строки
1.1 KiB
C
43 строки
1.1 KiB
C
/*
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* Split spinlock implementation out into its own file, so it can be
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* compiled in a FTRACE-compatible way.
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*/
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/jump_label.h>
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#include <asm/paravirt.h>
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#ifdef CONFIG_QUEUED_SPINLOCKS
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__visible void __native_queued_spin_unlock(struct qspinlock *lock)
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{
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native_queued_spin_unlock(lock);
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}
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PV_CALLEE_SAVE_REGS_THUNK(__native_queued_spin_unlock);
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bool pv_is_native_spin_unlock(void)
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{
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return pv_lock_ops.queued_spin_unlock.func ==
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__raw_callee_save___native_queued_spin_unlock;
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}
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#endif
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struct pv_lock_ops pv_lock_ops = {
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#ifdef CONFIG_SMP
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#ifdef CONFIG_QUEUED_SPINLOCKS
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.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
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.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock),
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.wait = paravirt_nop,
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.kick = paravirt_nop,
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#else /* !CONFIG_QUEUED_SPINLOCKS */
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.lock_spinning = __PV_IS_CALLEE_SAVE(paravirt_nop),
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.unlock_kick = paravirt_nop,
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#endif /* !CONFIG_QUEUED_SPINLOCKS */
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#endif /* SMP */
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};
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EXPORT_SYMBOL(pv_lock_ops);
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struct static_key paravirt_ticketlocks_enabled = STATIC_KEY_INIT_FALSE;
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EXPORT_SYMBOL(paravirt_ticketlocks_enabled);
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