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>
10 #include <linux/mm_types.h>
14 extern void uml_setup_stubs(struct mm_struct *mm);
16 * Needed since we do not use the asm-generic/mm_hooks.h:
18 static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm)
22 extern void arch_exit_mmap(struct mm_struct *mm);
23 static inline void arch_unmap(struct mm_struct *mm,
24 struct vm_area_struct *vma,
25 unsigned long start, unsigned long end)
28 static inline void arch_bprm_mm_init(struct mm_struct *mm,
29 struct vm_area_struct *vma)
33 static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
34 bool write, bool execute, bool foreign)
36 /* by default, allow everything */
40 static inline bool arch_pte_access_permitted(pte_t pte, bool write)
42 /* by default, allow everything */
47 * end asm-generic/mm_hooks.h functions
50 #define deactivate_mm(tsk,mm) do { } while (0)
52 extern void force_flush_all(void);
54 static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
57 * This is called by fs/exec.c and sys_unshare()
58 * when the new ->mm is used for the first time.
60 __switch_mm(&new->context.id);
61 down_write(&new->mmap_sem);
63 up_write(&new->mmap_sem);
66 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
67 struct task_struct *tsk)
69 unsigned cpu = smp_processor_id();
72 cpumask_clear_cpu(cpu, mm_cpumask(prev));
73 cpumask_set_cpu(cpu, mm_cpumask(next));
75 __switch_mm(&next->context.id);
79 static inline void enter_lazy_tlb(struct mm_struct *mm,
80 struct task_struct *tsk)
84 extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
86 extern void destroy_context(struct mm_struct *mm);