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 uml_setup_stubs(struct mm_struct *mm); 13/* 14 * Needed since we do not use the asm-generic/mm_hooks.h: 15 */ 16static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) 17{ 18 uml_setup_stubs(mm); 19} 20extern void arch_exit_mmap(struct mm_struct *mm); 21static inline void arch_unmap(struct mm_struct *mm, 22 struct vm_area_struct *vma, 23 unsigned long start, unsigned long end) 24{ 25} 26static inline void arch_bprm_mm_init(struct mm_struct *mm, 27 struct vm_area_struct *vma) 28{ 29} 30/* 31 * end asm-generic/mm_hooks.h functions 32 */ 33 34#define deactivate_mm(tsk,mm) do { } while (0) 35 36extern void force_flush_all(void); 37 38static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) 39{ 40 /* 41 * This is called by fs/exec.c and sys_unshare() 42 * when the new ->mm is used for the first time. 43 */ 44 __switch_mm(&new->context.id); 45 down_write(&new->mmap_sem); 46 uml_setup_stubs(new); 47 up_write(&new->mmap_sem); 48} 49 50static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 51 struct task_struct *tsk) 52{ 53 unsigned cpu = smp_processor_id(); 54 55 if(prev != next){ 56 cpumask_clear_cpu(cpu, mm_cpumask(prev)); 57 cpumask_set_cpu(cpu, mm_cpumask(next)); 58 if(next != &init_mm) 59 __switch_mm(&next->context.id); 60 } 61} 62 63static inline void enter_lazy_tlb(struct mm_struct *mm, 64 struct task_struct *tsk) 65{ 66} 67 68extern int init_new_context(struct task_struct *task, struct mm_struct *mm); 69 70extern void destroy_context(struct mm_struct *mm); 71 72#endif 73