| 1 |
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| 2 | #ifndef __ASM_GENERIC_MMU_CONTEXT_H
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| 3 | #define __ASM_GENERIC_MMU_CONTEXT_H
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| 4 |
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| 5 | |
| 6 | * Generic hooks to implement no-op functionality.
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| 7 |
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| 8 |
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| 9 | struct task_struct;
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| 10 | struct mm_struct;
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| 11 |
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| 12 | |
| 13 | * enter_lazy_tlb - Called when "tsk" is about to enter lazy TLB mode.
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| 14 | *
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| 15 | * @mm: the currently active mm context which is becoming lazy
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| 16 | * @tsk: task which is entering lazy tlb
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| 17 | *
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| 18 | * tsk->mm will be NULL
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| 19 |
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| 20 | #ifndef enter_lazy_tlb
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| 21 | static inline void enter_lazy_tlb(struct mm_struct *mm,
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| 22 | struct task_struct *tsk)
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| 23 | {
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| 24 | }
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| 25 | #endif
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| 26 |
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| 27 | |
| 28 | * init_new_context - Initialize context of a new mm_struct.
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| 29 | * @tsk: task struct for the mm
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| 30 | * @mm: the new mm struct
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| 31 | * @return: 0 on success, -errno on failure
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| 32 |
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| 33 | #ifndef init_new_context
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| 34 | static inline int init_new_context(struct task_struct *tsk,
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| 35 | struct mm_struct *mm)
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| 36 | {
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| 37 | return 0;
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| 38 | }
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| 39 | #endif
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| 40 |
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| 41 | |
| 42 | * destroy_context - Undo init_new_context when the mm is going away
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| 43 | * @mm: old mm struct
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| 44 |
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| 45 | #ifndef destroy_context
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| 46 | static inline void destroy_context(struct mm_struct *mm)
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| 47 | {
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| 48 | }
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| 49 | #endif
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| 50 |
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| 51 | |
| 52 | * activate_mm - called after exec switches the current task to a new mm, to switch to it
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| 53 | * @prev_mm: previous mm of this task
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| 54 | * @next_mm: new mm
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| 55 |
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| 56 | #ifndef activate_mm
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| 57 | static inline void activate_mm(struct mm_struct *prev_mm,
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| 58 | struct mm_struct *next_mm)
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| 59 | {
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| 60 | switch_mm(prev_mm, next_mm, current);
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| 61 | }
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| 62 | #endif
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| 63 |
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| 64 | |
| 65 | * dectivate_mm - called when an mm is released after exit or exec switches away from it
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| 66 | * @tsk: the task
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| 67 | * @mm: the old mm
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| 68 |
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| 69 | #ifndef deactivate_mm
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| 70 | static inline void deactivate_mm(struct task_struct *tsk,
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| 71 | struct mm_struct *mm)
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| 72 | {
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| 73 | }
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| 74 | #endif
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| 75 |
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| 76 | #endif
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