1 /* 2 * Copyright (c) 2018-2020 François Tigeot <ftigeot@wolfpond.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_STOP_MACHINE_H_ 28 #define _LINUX_STOP_MACHINE_H_ 29 30 #include <linux/cpumask.h> 31 #include <linux/smp.h> 32 #include <linux/list.h> 33 34 #include <sys/mplock2.h> 35 36 typedef int (*cpu_stop_fn_t)(void *arg); 37 38 static inline int 39 stop_machine(cpu_stop_fn_t fn, void *data, const struct cpumask *cpus) 40 { 41 int res; 42 43 /* XXX: is this enough ? 44 * See Linux commit 5bab6f60cb4d1417ad7c599166bcfec87529c1a2 */ 45 get_mplock(); 46 res = (*fn)(data); 47 rel_mplock(); 48 49 return res; 50 } 51 52 #endif /* _LINUX_STOP_MACHINE_H_ */ 53