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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* 
   3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   4 */
   5
   6#ifndef __UM_MMU_CONTEXT_H
   7#define __UM_MMU_CONTEXT_H
   8
   9#include <linux/sched.h>
  10#include <linux/mm_types.h>
  11#include <linux/mmap_lock.h>
  12
  13#include <asm/mm_hooks.h>
  14#include <asm/mmu.h>
  15
  16extern void force_flush_all(void);
  17
  18#define activate_mm activate_mm
  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}
  27
  28static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
  29                             struct task_struct *tsk)
  30{
  31        unsigned cpu = smp_processor_id();
  32
  33        if(prev != next){
  34                cpumask_clear_cpu(cpu, mm_cpumask(prev));
  35                cpumask_set_cpu(cpu, mm_cpumask(next));
  36                if(next != &init_mm)
  37                        __switch_mm(&next->context.id);
  38        }
  39}
  40
  41#define init_new_context init_new_context
  42extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
  43
  44#define destroy_context destroy_context
  45extern void destroy_context(struct mm_struct *mm);
  46
  47#include <asm-generic/mmu_context.h>
  48
  49#endif
  50