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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
5c01b46b AB |
2 | #ifndef __ASM_GENERIC_MMU_CONTEXT_H |
3 | #define __ASM_GENERIC_MMU_CONTEXT_H | |
4 | ||
5 | /* | |
94f89922 | 6 | * Generic hooks to implement no-op functionality. |
5c01b46b AB |
7 | */ |
8 | ||
5c01b46b AB |
9 | struct task_struct; |
10 | struct mm_struct; | |
11 | ||
94f89922 NP |
12 | /* |
13 | * enter_lazy_tlb - Called when "tsk" is about to enter lazy TLB mode. | |
14 | * | |
15 | * @mm: the currently active mm context which is becoming lazy | |
16 | * @tsk: task which is entering lazy tlb | |
17 | * | |
18 | * tsk->mm will be NULL | |
19 | */ | |
20 | #ifndef enter_lazy_tlb | |
5c01b46b AB |
21 | static inline void enter_lazy_tlb(struct mm_struct *mm, |
22 | struct task_struct *tsk) | |
23 | { | |
24 | } | |
94f89922 | 25 | #endif |
5c01b46b | 26 | |
94f89922 NP |
27 | /** |
28 | * init_new_context - Initialize context of a new mm_struct. | |
29 | * @tsk: task struct for the mm | |
30 | * @mm: the new mm struct | |
31 | * @return: 0 on success, -errno on failure | |
32 | */ | |
33 | #ifndef init_new_context | |
5c01b46b AB |
34 | static inline int init_new_context(struct task_struct *tsk, |
35 | struct mm_struct *mm) | |
36 | { | |
37 | return 0; | |
38 | } | |
94f89922 | 39 | #endif |
5c01b46b | 40 | |
94f89922 NP |
41 | /** |
42 | * destroy_context - Undo init_new_context when the mm is going away | |
43 | * @mm: old mm struct | |
44 | */ | |
45 | #ifndef destroy_context | |
5c01b46b AB |
46 | static inline void destroy_context(struct mm_struct *mm) |
47 | { | |
48 | } | |
94f89922 | 49 | #endif |
5c01b46b | 50 | |
94f89922 NP |
51 | /** |
52 | * activate_mm - called after exec switches the current task to a new mm, to switch to it | |
53 | * @prev_mm: previous mm of this task | |
54 | * @next_mm: new mm | |
55 | */ | |
56 | #ifndef activate_mm | |
57 | static inline void activate_mm(struct mm_struct *prev_mm, | |
58 | struct mm_struct *next_mm) | |
5c01b46b | 59 | { |
94f89922 | 60 | switch_mm(prev_mm, next_mm, current); |
5c01b46b | 61 | } |
94f89922 | 62 | #endif |
5c01b46b | 63 | |
94f89922 NP |
64 | /** |
65 | * dectivate_mm - called when an mm is released after exit or exec switches away from it | |
66 | * @tsk: the task | |
67 | * @mm: the old mm | |
68 | */ | |
69 | #ifndef deactivate_mm | |
70 | static inline void deactivate_mm(struct task_struct *tsk, | |
71 | struct mm_struct *mm) | |
5c01b46b AB |
72 | { |
73 | } | |
94f89922 | 74 | #endif |
5c01b46b AB |
75 | |
76 | #endif /* __ASM_GENERIC_MMU_CONTEXT_H */ |