tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 "um_mmu.h"
11
12extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
13extern void arch_exit_mmap(struct mm_struct *mm);
14
15#define get_mmu_context(task) do ; while(0)
16#define activate_context(tsk) do ; while(0)
17
18#define deactivate_mm(tsk,mm) do { } while (0)
19
20extern void force_flush_all(void);
21
22static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
23{
24 /*
25 * This is called by fs/exec.c and sys_unshare()
26 * when the new ->mm is used for the first time.
27 */
28 __switch_mm(&new->context.id);
29 arch_dup_mmap(old, new);
30}
31
32static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
33 struct task_struct *tsk)
34{
35 unsigned cpu = smp_processor_id();
36
37 if(prev != next){
38 cpumask_clear_cpu(cpu, mm_cpumask(prev));
39 cpumask_set_cpu(cpu, mm_cpumask(next));
40 if(next != &init_mm)
41 __switch_mm(&next->context.id);
42 }
43}
44
45static inline void enter_lazy_tlb(struct mm_struct *mm,
46 struct task_struct *tsk)
47{
48}
49
50extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
51
52extern void destroy_context(struct mm_struct *mm);
53
54#endif