2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
6 #ifndef __UM_MMU_CONTEXT_H
7 #define __UM_MMU_CONTEXT_H
9 #include "linux/sched.h"
12 extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
13 extern void arch_exit_mmap(struct mm_struct *mm);
15 #define get_mmu_context(task) do ; while(0)
16 #define activate_context(tsk) do ; while(0)
18 #define deactivate_mm(tsk,mm) do { } while (0)
20 extern void force_flush_all(void);
22 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
25 * This is called by fs/exec.c and sys_unshare()
26 * when the new ->mm is used for the first time.
28 __switch_mm(&new->context.id);
29 arch_dup_mmap(old, new);
32 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
33 struct task_struct *tsk)
35 unsigned cpu = smp_processor_id();
38 cpu_clear(cpu, prev->cpu_vm_mask);
39 cpu_set(cpu, next->cpu_vm_mask);
41 __switch_mm(&next->context.id);
45 static inline void enter_lazy_tlb(struct mm_struct *mm,
46 struct task_struct *tsk)
50 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
52 extern void destroy_context(struct mm_struct *mm);