1ad53fa10SWaiman Long /* SPDX-License-Identifier: GPL-2.0 */
2ad53fa10SWaiman Long /*
3ad53fa10SWaiman Long * This program is free software; you can redistribute it and/or modify
4ad53fa10SWaiman Long * it under the terms of the GNU General Public License as published by
5ad53fa10SWaiman Long * the Free Software Foundation; either version 2 of the License, or
6ad53fa10SWaiman Long * (at your option) any later version.
7ad53fa10SWaiman Long *
8ad53fa10SWaiman Long * This program is distributed in the hope that it will be useful,
9ad53fa10SWaiman Long * but WITHOUT ANY WARRANTY; without even the implied warranty of
10ad53fa10SWaiman Long * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11ad53fa10SWaiman Long * GNU General Public License for more details.
12ad53fa10SWaiman Long *
13ad53fa10SWaiman Long * Authors: Waiman Long <longman@redhat.com>
14ad53fa10SWaiman Long */
15ad53fa10SWaiman Long
16fb346fd9SWaiman Long #ifndef __LOCKING_LOCK_EVENTS_H
17fb346fd9SWaiman Long #define __LOCKING_LOCK_EVENTS_H
18fb346fd9SWaiman Long
19ad53fa10SWaiman Long enum lock_events {
20ad53fa10SWaiman Long
21ad53fa10SWaiman Long #include "lock_events_list.h"
22ad53fa10SWaiman Long
23ad53fa10SWaiman Long lockevent_num, /* Total number of lock event counts */
24ad53fa10SWaiman Long LOCKEVENT_reset_cnts = lockevent_num,
25ad53fa10SWaiman Long };
26ad53fa10SWaiman Long
27fb346fd9SWaiman Long #ifdef CONFIG_LOCK_EVENT_COUNTS
28ad53fa10SWaiman Long /*
29ad53fa10SWaiman Long * Per-cpu counters
30ad53fa10SWaiman Long */
31ad53fa10SWaiman Long DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]);
32ad53fa10SWaiman Long
33ad53fa10SWaiman Long /*
3424811637SPeter Zijlstra * Increment the statistical counters. use raw_cpu_inc() because of lower
3524811637SPeter Zijlstra * overhead and we don't care if we loose the occasional update.
36ad53fa10SWaiman Long */
__lockevent_inc(enum lock_events event,bool cond)37ad53fa10SWaiman Long static inline void __lockevent_inc(enum lock_events event, bool cond)
38ad53fa10SWaiman Long {
39ad53fa10SWaiman Long if (cond)
4024811637SPeter Zijlstra raw_cpu_inc(lockevents[event]);
41ad53fa10SWaiman Long }
42ad53fa10SWaiman Long
43ad53fa10SWaiman Long #define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true)
44ad53fa10SWaiman Long #define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c)
45ad53fa10SWaiman Long
__lockevent_add(enum lock_events event,int inc)46ad53fa10SWaiman Long static inline void __lockevent_add(enum lock_events event, int inc)
47ad53fa10SWaiman Long {
4824811637SPeter Zijlstra raw_cpu_add(lockevents[event], inc);
49ad53fa10SWaiman Long }
50ad53fa10SWaiman Long
51ad53fa10SWaiman Long #define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c)
52ad53fa10SWaiman Long
53fb346fd9SWaiman Long #else /* CONFIG_LOCK_EVENT_COUNTS */
54ad53fa10SWaiman Long
55ad53fa10SWaiman Long #define lockevent_inc(ev)
56ad53fa10SWaiman Long #define lockevent_add(ev, c)
57ad53fa10SWaiman Long #define lockevent_cond_inc(ev, c)
58ad53fa10SWaiman Long
59fb346fd9SWaiman Long #endif /* CONFIG_LOCK_EVENT_COUNTS */
60*ff713881SArnd Bergmann
61*ff713881SArnd Bergmann ssize_t lockevent_read(struct file *file, char __user *user_buf,
62*ff713881SArnd Bergmann size_t count, loff_t *ppos);
63*ff713881SArnd Bergmann
64fb346fd9SWaiman Long #endif /* __LOCKING_LOCK_EVENTS_H */
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