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Commit | Line | Data |
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1da177e4 | 1 | /* |
ba180fd4 | 2 | * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
6 | #ifndef __UM_MMU_CONTEXT_H | |
7 | #define __UM_MMU_CONTEXT_H | |
8 | ||
4dc706c2 | 9 | #include <linux/sched.h> |
589ee628 IM |
10 | #include <linux/mm_types.h> |
11 | ||
4dc706c2 | 12 | #include <asm/mmu.h> |
1da177e4 | 13 | |
ac2aca28 | 14 | extern void uml_setup_stubs(struct mm_struct *mm); |
62e88b1c DH |
15 | /* |
16 | * Needed since we do not use the asm-generic/mm_hooks.h: | |
17 | */ | |
c10e83f5 | 18 | static inline int arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) |
62e88b1c DH |
19 | { |
20 | uml_setup_stubs(mm); | |
c10e83f5 | 21 | return 0; |
62e88b1c | 22 | } |
3963333f | 23 | extern void arch_exit_mmap(struct mm_struct *mm); |
62e88b1c | 24 | static inline void arch_unmap(struct mm_struct *mm, |
62e88b1c DH |
25 | unsigned long start, unsigned long end) |
26 | { | |
27 | } | |
28 | static inline void arch_bprm_mm_init(struct mm_struct *mm, | |
29 | struct vm_area_struct *vma) | |
30 | { | |
31 | } | |
9d95b175 DH |
32 | |
33 | static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, | |
34 | bool write, bool execute, bool foreign) | |
9d95b175 DH |
35 | { |
36 | /* by default, allow everything */ | |
37 | return true; | |
38 | } | |
39 | ||
62e88b1c DH |
40 | /* |
41 | * end asm-generic/mm_hooks.h functions | |
42 | */ | |
3963333f | 43 | |
1da177e4 LT |
44 | #define deactivate_mm(tsk,mm) do { } while (0) |
45 | ||
c40504e8 BL |
46 | extern void force_flush_all(void); |
47 | ||
1da177e4 LT |
48 | static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) |
49 | { | |
1e40cd38 | 50 | /* |
aab2545f ON |
51 | * This is called by fs/exec.c and sys_unshare() |
52 | * when the new ->mm is used for the first time. | |
1e40cd38 | 53 | */ |
aab2545f | 54 | __switch_mm(&new->context.id); |
ac2aca28 AV |
55 | down_write(&new->mmap_sem); |
56 | uml_setup_stubs(new); | |
57 | up_write(&new->mmap_sem); | |
1da177e4 LT |
58 | } |
59 | ||
1da177e4 LT |
60 | static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, |
61 | struct task_struct *tsk) | |
62 | { | |
63 | unsigned cpu = smp_processor_id(); | |
64 | ||
65 | if(prev != next){ | |
fa40699b RR |
66 | cpumask_clear_cpu(cpu, mm_cpumask(prev)); |
67 | cpumask_set_cpu(cpu, mm_cpumask(next)); | |
1da177e4 | 68 | if(next != &init_mm) |
6c738ffa | 69 | __switch_mm(&next->context.id); |
1da177e4 LT |
70 | } |
71 | } | |
72 | ||
73 | static inline void enter_lazy_tlb(struct mm_struct *mm, | |
74 | struct task_struct *tsk) | |
75 | { | |
76 | } | |
77 | ||
77bf4400 | 78 | extern int init_new_context(struct task_struct *task, struct mm_struct *mm); |
1da177e4 | 79 | |
77bf4400 | 80 | extern void destroy_context(struct mm_struct *mm); |
1da177e4 LT |
81 | |
82 | #endif |