1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
4  */
5 
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
8 
9 #include <linux/sched.h>
10 #include <linux/mm_types.h>
11 #include <linux/mmap_lock.h>
12 
13 #include <asm/mm_hooks.h>
14 #include <asm/mmu.h>
15 
16 extern void force_flush_all(void);
17 
18 #define activate_mm activate_mm
activate_mm(struct mm_struct * old,struct mm_struct * new)19 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
20 {
21 	/*
22 	 * This is called by fs/exec.c and sys_unshare()
23 	 * when the new ->mm is used for the first time.
24 	 */
25 	__switch_mm(&new->context.id);
26 }
27 
switch_mm(struct mm_struct * prev,struct mm_struct * next,struct task_struct * tsk)28 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
29 			     struct task_struct *tsk)
30 {
31 	unsigned cpu = smp_processor_id();
32 
33 	if(prev != next){
34 		cpumask_clear_cpu(cpu, mm_cpumask(prev));
35 		cpumask_set_cpu(cpu, mm_cpumask(next));
36 		if(next != &init_mm)
37 			__switch_mm(&next->context.id);
38 	}
39 }
40 
41 #define init_new_context init_new_context
42 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
43 
44 #define destroy_context destroy_context
45 extern void destroy_context(struct mm_struct *mm);
46 
47 #include <asm-generic/mmu_context.h>
48 
49 #endif
50