License cleanup: add SPDX GPL-2.0 license identifier to files with no license

[mirror_ubuntu-focal-kernel.git] / tools / testing / selftests / rcutorture / formal / srcu-cbmc / src / preempt.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef PREEMPT_H
#define PREEMPT_H

#include <stdbool.h>

#include "bug_on.h"

/* This flag contains garbage if preempt_disable_count is 0. */
extern __thread int thread_cpu_id;

/* Support recursive preemption disabling. */
extern __thread int preempt_disable_count;

void preempt_disable(void);
void preempt_enable(void);

static inline void preempt_disable_notrace(void)
{
	preempt_disable();
}

static inline void preempt_enable_no_resched(void)
{
	preempt_enable();
}

static inline void preempt_enable_notrace(void)
{
	preempt_enable();
}

static inline int preempt_count(void)
{
	return preempt_disable_count;
}

static inline bool preemptible(void)
{
	return !preempt_count();
}

static inline int get_cpu(void)
{
	preempt_disable();
	return thread_cpu_id;
}

static inline void put_cpu(void)
{
	preempt_enable();
}

static inline void might_sleep(void)
{
	BUG_ON(preempt_disable_count);
}

#endif