xref: /linux-6.15/include/linux/mmap_lock.h (revision 9740ca4e) 
1 #ifndef _LINUX_MMAP_LOCK_H
2 #define _LINUX_MMAP_LOCK_H
3 
4 static inline void mmap_init_lock(struct mm_struct *mm)
5 {
6 	init_rwsem(&mm->mmap_sem);
7 }
8 
9 static inline void mmap_write_lock(struct mm_struct *mm)
10 {
11 	down_write(&mm->mmap_sem);
12 }
13 
14 static inline int mmap_write_lock_killable(struct mm_struct *mm)
15 {
16 	return down_write_killable(&mm->mmap_sem);
17 }
18 
19 static inline bool mmap_write_trylock(struct mm_struct *mm)
20 {
21 	return down_write_trylock(&mm->mmap_sem) != 0;
22 }
23 
24 static inline void mmap_write_unlock(struct mm_struct *mm)
25 {
26 	up_write(&mm->mmap_sem);
27 }
28 
29 static inline void mmap_write_downgrade(struct mm_struct *mm)
30 {
31 	downgrade_write(&mm->mmap_sem);
32 }
33 
34 static inline void mmap_read_lock(struct mm_struct *mm)
35 {
36 	down_read(&mm->mmap_sem);
37 }
38 
39 static inline int mmap_read_lock_killable(struct mm_struct *mm)
40 {
41 	return down_read_killable(&mm->mmap_sem);
42 }
43 
44 static inline bool mmap_read_trylock(struct mm_struct *mm)
45 {
46 	return down_read_trylock(&mm->mmap_sem) != 0;
47 }
48 
49 static inline void mmap_read_unlock(struct mm_struct *mm)
50 {
51 	up_read(&mm->mmap_sem);
52 }
53 
54 #endif /* _LINUX_MMAP_LOCK_H */
55