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/* SPDX-License-Identifier: GPL-2.0 */
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Authors: Waiman Long <longman@redhat.com>
*/
#ifndef __LOCKING_LOCK_EVENTS_H
#define __LOCKING_LOCK_EVENTS_H
enum lock_events {
#include "lock_events_list.h"
lockevent_num, /* Total number of lock event counts */
LOCKEVENT_reset_cnts = lockevent_num,
};
#ifdef CONFIG_LOCK_EVENT_COUNTS
/*
* Per-cpu counters
*/
DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]);
/*
* Increment the statistical counters. use raw_cpu_inc() because of lower
* overhead and we don't care if we loose the occasional update.
*/
static inline void __lockevent_inc(enum lock_events event, bool cond)
{
if (cond)
raw_cpu_inc(lockevents[event]);
}
#define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true)
#define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c)
static inline void __lockevent_add(enum lock_events event, int inc)
{
raw_cpu_add(lockevents[event], inc);
}
#define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c)
#else /* CONFIG_LOCK_EVENT_COUNTS */
#define lockevent_inc(ev)
#define lockevent_add(ev, c)
#define lockevent_cond_inc(ev, c)
#endif /* CONFIG_LOCK_EVENT_COUNTS */
ssize_t lockevent_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos);
#endif /* __LOCKING_LOCK_EVENTS_H */
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