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/* mmu_context.h: MMU context management routines
*
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_MMU_CONTEXT_H
#define _ASM_MMU_CONTEXT_H
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm-generic/mm_hooks.h>
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
}
#ifdef CONFIG_MMU
extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
extern void change_mm_context(mm_context_t *old, mm_context_t *ctx, pgd_t *_pgd);
extern void destroy_context(struct mm_struct *mm);
#else
#define init_new_context(tsk, mm) ({ 0; })
#define change_mm_context(old, ctx, _pml4) do {} while(0)
#define destroy_context(mm) do {} while(0)
#endif
#define switch_mm(prev, next, tsk) \
do { \
if (prev != next) \
change_mm_context(&prev->context, &next->context, next->pgd); \
} while(0)
#define activate_mm(prev, next) \
do { \
change_mm_context(&prev->context, &next->context, next->pgd); \
} while(0)
#define deactivate_mm(tsk, mm) \
do { \
} while(0)
#endif