LXR linux/arch/um/include/asm/mmu

   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 arch_dup_mmap(struct mm_struct *oldmm, 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        arch_dup_mmap(old, new);
  27}
  28
  29static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
  30                             struct task_struct *tsk)
  31{
  32        unsigned cpu = smp_processor_id();
  33
  34        if(prev != next){
  35                cpumask_clear_cpu(cpu, mm_cpumask(prev));
  36                cpumask_set_cpu(cpu, mm_cpumask(next));
  37                if(next != &init_mm)
  38                        __switch_mm(&next->context.id);
  39        }
  40}
  41
  42static inline void enter_lazy_tlb(struct mm_struct *mm, 
  43                                  struct task_struct *tsk)
  44{
  45}
  46
  47extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
  48
  49extern void destroy_context(struct mm_struct *mm);
  50
  51#endif
  52