1 /* 2 * Copyright (c) 2019-2020 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_SMP_H_ 28 #define _LINUX_SMP_H_ 29 30 #include <linux/errno.h> 31 #include <linux/types.h> 32 #include <linux/list.h> 33 #include <linux/cpumask.h> 34 #include <linux/init.h> 35 #include <linux/llist.h> 36 37 #include <linux/preempt.h> 38 #include <linux/kernel.h> 39 #include <linux/compiler.h> 40 #include <linux/thread_info.h> 41 42 static inline uint32_t smp_processor_id(void) 43 { 44 return mycpuid; 45 } 46 47 static inline uint32_t get_cpu(void) 48 { 49 preempt_disable(); 50 51 /* Regular DragonFly kernel threads always run on the same CPU */ 52 return 0; 53 } 54 55 #define put_cpu() preempt_enable() 56 57 #endif /* _LINUX_SMP_H_ */ 58