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