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1/*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __UM_MMU_CONTEXT_H
7#define __UM_MMU_CONTEXT_H
8
9#include <linux/sched.h>
10#include <asm/mmu.h>
11
12extern void uml_setup_stubs(struct mm_struct *mm);
13extern void arch_exit_mmap(struct mm_struct *mm);
14
15#define deactivate_mm(tsk,mm) do { } while (0)
16
17extern void force_flush_all(void);
18
19static 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 down_write(&new->mmap_sem);
27 uml_setup_stubs(new);
28 up_write(&new->mmap_sem);
29}
30
31static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
32 struct task_struct *tsk)
33{
34 unsigned cpu = smp_processor_id();
35
36 if(prev != next){
37 cpumask_clear_cpu(cpu, mm_cpumask(prev));
38 cpumask_set_cpu(cpu, mm_cpumask(next));
39 if(next != &init_mm)
40 __switch_mm(&next->context.id);
41 }
42}
43
44static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
45{
46 uml_setup_stubs(mm);
47}
48
49static inline void enter_lazy_tlb(struct mm_struct *mm,
50 struct task_struct *tsk)
51{
52}
53
54extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
55
56extern void destroy_context(struct mm_struct *mm);
57
58#endif