| 1 |
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| 2 | |
| 3 | * This program is free software; you can redistribute it and/or modify
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| 4 | * it under the terms of the GNU General Public License as published by
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| 5 | * the Free Software Foundation; either version 2 of the License, or
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| 6 | * (at your option) any later version.
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| 7 | *
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| 8 | * This program is distributed in the hope that it will be useful,
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 11 | * GNU General Public License for more details.
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| 12 | *
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| 13 | * Authors: Waiman Long <[email protected]>
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| 14 |
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| 15 |
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| 16 | #ifndef __LOCKING_LOCK_EVENTS_H
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| 17 | #define __LOCKING_LOCK_EVENTS_H
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| 18 |
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| 19 | enum lock_events {
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| 20 |
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| 21 | #include "lock_events_list.h"
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| 22 |
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| 23 | lockevent_num,
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| 24 | LOCKEVENT_reset_cnts = lockevent_num,
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| 25 | };
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| 26 |
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| 27 | #ifdef CONFIG_LOCK_EVENT_COUNTS
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| 28 | |
| 29 | * Per-cpu counters
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| 30 |
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| 31 | DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]);
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| 32 |
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| 33 | |
| 34 | * Increment the statistical counters. use raw_cpu_inc() because of lower
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| 35 | * overhead and we don't care if we loose the occasional update.
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| 36 |
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| 37 | static inline void __lockevent_inc(enum lock_events event, bool cond)
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| 38 | {
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| 39 | if (cond)
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| 40 | raw_cpu_inc(lockevents[event]);
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| 41 | }
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| 42 |
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| 43 | #define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true)
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| 44 | #define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c)
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| 45 |
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| 46 | static inline void __lockevent_add(enum lock_events event, int inc)
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| 47 | {
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| 48 | raw_cpu_add(lockevents[event], inc);
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| 49 | }
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| 50 |
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| 51 | #define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c)
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| 52 |
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| 53 | #else
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| 54 |
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| 55 | #define lockevent_inc(ev)
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| 56 | #define lockevent_add(ev, c) do { (void)(c); } while (0)
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| 57 | #define lockevent_cond_inc(ev, c) do { (void)(c); } while (0)
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| 58 |
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| 59 | #endif
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| 60 |
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| 61 | ssize_t lockevent_read(struct file *file, char __user *user_buf,
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| 62 | size_t count, loff_t *ppos);
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| 63 |
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| 64 | #endif
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