1#ifndef __ASM_GENERIC_MMU_CONTEXT_H
 2#define __ASM_GENERIC_MMU_CONTEXT_H
 3
 4/*
 5 * Generic hooks for NOMMU architectures, which do not need to do
 6 * anything special here.
 7 */
 8
 9#include <asm-generic/mm_hooks.h>
10
11struct task_struct;
12struct mm_struct;
13
 
 
 
 
 
 
 
 
 
14static inline void enter_lazy_tlb(struct mm_struct *mm,
15			struct task_struct *tsk)
16{
17}
 
18
 
 
 
 
 
 
 
19static inline int init_new_context(struct task_struct *tsk,
20			struct mm_struct *mm)
21{
22	return 0;
23}
 
24
 
 
 
 
 
25static inline void destroy_context(struct mm_struct *mm)
26{
27}
 
28
29static inline void deactivate_mm(struct task_struct *task,
30			struct mm_struct *mm)
31{
32}
33
34static inline void switch_mm(struct mm_struct *prev,
35			struct mm_struct *next,
36			struct task_struct *tsk)
37{
 
38}
 
39
40static inline void activate_mm(struct mm_struct *prev_mm,
41			       struct mm_struct *next_mm)
 
 
 
 
 
 
42{
43}
 
44
45#endif /* __ASM_GENERIC_MMU_CONTEXT_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_GENERIC_MMU_CONTEXT_H
 3#define __ASM_GENERIC_MMU_CONTEXT_H
 4
 5/*
 6 * Generic hooks to implement no-op functionality.
 
 7 */
 8
 
 
 9struct task_struct;
10struct mm_struct;
11
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
21static inline void enter_lazy_tlb(struct mm_struct *mm,
22			struct task_struct *tsk)
23{
24}
25#endif
26
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
34static inline int init_new_context(struct task_struct *tsk,
35			struct mm_struct *mm)
36{
37	return 0;
38}
39#endif
40
41/**
42 * destroy_context - Undo init_new_context when the mm is going away
43 * @mm: old mm struct
44 */
45#ifndef destroy_context
46static inline void destroy_context(struct mm_struct *mm)
47{
48}
49#endif
50
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
57static inline void activate_mm(struct mm_struct *prev_mm,
58			       struct mm_struct *next_mm)
59{
60	switch_mm(prev_mm, next_mm, current);
61}
62#endif
63
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
70static inline void deactivate_mm(struct task_struct *tsk,
71			struct mm_struct *mm)
72{
73}
74#endif
75
76#endif /* __ASM_GENERIC_MMU_CONTEXT_H */