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 #define activate_mm activate_mm
activate_mm(struct mm_struct * old,struct mm_struct * new)17 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
18 {
19 /*
20 * This is called by fs/exec.c and sys_unshare()
21 * when the new ->mm is used for the first time.
22 */
23 __switch_mm(&new->context.id);
24 }
25
switch_mm(struct mm_struct * prev,struct mm_struct * next,struct task_struct * tsk)26 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
27 struct task_struct *tsk)
28 {
29 unsigned cpu = smp_processor_id();
30
31 if(prev != next){
32 cpumask_clear_cpu(cpu, mm_cpumask(prev));
33 cpumask_set_cpu(cpu, mm_cpumask(next));
34 if(next != &init_mm)
35 __switch_mm(&next->context.id);
36 }
37 }
38
39 #define init_new_context init_new_context
40 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
41
42 #define destroy_context destroy_context
43 extern void destroy_context(struct mm_struct *mm);
44
45 #include <asm-generic/mmu_context.h>
46
47 #endif
48