mmu_context.h

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/* 
 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 * Licensed under the GPL
 */

#ifndef __UM_MMU_CONTEXT_H
#define __UM_MMU_CONTEXT_H

#include <linux/sched.h>
#include <asm/mmu.h>

extern void uml_setup_stubs(struct mm_struct *mm);
extern void arch_exit_mmap(struct mm_struct *mm);

#define deactivate_mm(tsk,mm)   do { } while (0)

extern void force_flush_all(void);

static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
{
    /*
     * This is called by fs/exec.c and sys_unshare()
     * when the new ->mm is used for the first time.
     */
    __switch_mm(&new->context.id);
    down_write(&new->mmap_sem);
    uml_setup_stubs(new);
    up_write(&new->mmap_sem);
}

static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
                 struct task_struct *tsk)
{
    unsigned cpu = smp_processor_id();

    if(prev != next){
        cpumask_clear_cpu(cpu, mm_cpumask(prev));
        cpumask_set_cpu(cpu, mm_cpumask(next));
        if(next != &init_mm)
            __switch_mm(&next->context.id);
    }
}

static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
{
    uml_setup_stubs(mm);
}

static inline void enter_lazy_tlb(struct mm_struct *mm, 
                  struct task_struct *tsk)
{
}

extern int init_new_context(struct task_struct *task, struct mm_struct *mm);

extern void destroy_context(struct mm_struct *mm);

#endif