1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation; either version 2 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * Authors: Waiman Long <longman@redhat.com> 14 */ 15 16 #ifndef __LOCKING_LOCK_EVENTS_H 17 #define __LOCKING_LOCK_EVENTS_H 18 19 enum lock_events { 20 21 #include "lock_events_list.h" 22 23 lockevent_num, /* Total number of lock event counts */ 24 LOCKEVENT_reset_cnts = lockevent_num, 25 }; 26 27 #ifdef CONFIG_LOCK_EVENT_COUNTS 28 /* 29 * Per-cpu counters 30 */ 31 DECLARE_PER_CPU(unsigned long, lockevents[lockevent_num]); 32 33 /* 34 * Increment the PV qspinlock statistical counters 35 */ 36 static inline void __lockevent_inc(enum lock_events event, bool cond) 37 { 38 if (cond) 39 __this_cpu_inc(lockevents[event]); 40 } 41 42 #define lockevent_inc(ev) __lockevent_inc(LOCKEVENT_ ##ev, true) 43 #define lockevent_cond_inc(ev, c) __lockevent_inc(LOCKEVENT_ ##ev, c) 44 45 static inline void __lockevent_add(enum lock_events event, int inc) 46 { 47 __this_cpu_add(lockevents[event], inc); 48 } 49 50 #define lockevent_add(ev, c) __lockevent_add(LOCKEVENT_ ##ev, c) 51 52 #else /* CONFIG_LOCK_EVENT_COUNTS */ 53 54 #define lockevent_inc(ev) 55 #define lockevent_add(ev, c) 56 #define lockevent_cond_inc(ev, c) 57 58 #endif /* CONFIG_LOCK_EVENT_COUNTS */ 59 #endif /* __LOCKING_LOCK_EVENTS_H */ 60