Commit | Line | Data |
---|---|---|
9740ca4e ML |
1 | #ifndef _LINUX_MMAP_LOCK_H |
2 | #define _LINUX_MMAP_LOCK_H | |
3 | ||
42fc5414 ML |
4 | #include <linux/mmdebug.h> |
5 | ||
14c3656b | 6 | #define MMAP_LOCK_INITIALIZER(name) \ |
da1c55f1 | 7 | .mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock), |
14c3656b | 8 | |
9740ca4e ML |
9 | static inline void mmap_init_lock(struct mm_struct *mm) |
10 | { | |
da1c55f1 | 11 | init_rwsem(&mm->mmap_lock); |
9740ca4e ML |
12 | } |
13 | ||
14 | static inline void mmap_write_lock(struct mm_struct *mm) | |
15 | { | |
da1c55f1 | 16 | down_write(&mm->mmap_lock); |
9740ca4e ML |
17 | } |
18 | ||
aaa2cc56 ML |
19 | static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass) |
20 | { | |
da1c55f1 | 21 | down_write_nested(&mm->mmap_lock, subclass); |
aaa2cc56 ML |
22 | } |
23 | ||
9740ca4e ML |
24 | static inline int mmap_write_lock_killable(struct mm_struct *mm) |
25 | { | |
da1c55f1 | 26 | return down_write_killable(&mm->mmap_lock); |
9740ca4e ML |
27 | } |
28 | ||
29 | static inline bool mmap_write_trylock(struct mm_struct *mm) | |
30 | { | |
da1c55f1 | 31 | return down_write_trylock(&mm->mmap_lock) != 0; |
9740ca4e ML |
32 | } |
33 | ||
34 | static inline void mmap_write_unlock(struct mm_struct *mm) | |
35 | { | |
da1c55f1 | 36 | up_write(&mm->mmap_lock); |
9740ca4e ML |
37 | } |
38 | ||
39 | static inline void mmap_write_downgrade(struct mm_struct *mm) | |
40 | { | |
da1c55f1 | 41 | downgrade_write(&mm->mmap_lock); |
9740ca4e ML |
42 | } |
43 | ||
44 | static inline void mmap_read_lock(struct mm_struct *mm) | |
45 | { | |
da1c55f1 | 46 | down_read(&mm->mmap_lock); |
9740ca4e ML |
47 | } |
48 | ||
49 | static inline int mmap_read_lock_killable(struct mm_struct *mm) | |
50 | { | |
da1c55f1 | 51 | return down_read_killable(&mm->mmap_lock); |
9740ca4e ML |
52 | } |
53 | ||
54 | static inline bool mmap_read_trylock(struct mm_struct *mm) | |
55 | { | |
da1c55f1 | 56 | return down_read_trylock(&mm->mmap_lock) != 0; |
9740ca4e ML |
57 | } |
58 | ||
59 | static inline void mmap_read_unlock(struct mm_struct *mm) | |
60 | { | |
da1c55f1 | 61 | up_read(&mm->mmap_lock); |
9740ca4e ML |
62 | } |
63 | ||
0cc55a02 ML |
64 | static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm) |
65 | { | |
da1c55f1 ML |
66 | if (down_read_trylock(&mm->mmap_lock)) { |
67 | rwsem_release(&mm->mmap_lock.dep_map, _RET_IP_); | |
0cc55a02 ML |
68 | return true; |
69 | } | |
70 | return false; | |
71 | } | |
72 | ||
73 | static inline void mmap_read_unlock_non_owner(struct mm_struct *mm) | |
74 | { | |
da1c55f1 | 75 | up_read_non_owner(&mm->mmap_lock); |
0cc55a02 ML |
76 | } |
77 | ||
42fc5414 ML |
78 | static inline void mmap_assert_locked(struct mm_struct *mm) |
79 | { | |
da1c55f1 ML |
80 | lockdep_assert_held(&mm->mmap_lock); |
81 | VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm); | |
42fc5414 ML |
82 | } |
83 | ||
84 | static inline void mmap_assert_write_locked(struct mm_struct *mm) | |
85 | { | |
da1c55f1 ML |
86 | lockdep_assert_held_write(&mm->mmap_lock); |
87 | VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm); | |
42fc5414 ML |
88 | } |
89 | ||
9740ca4e | 90 | #endif /* _LINUX_MMAP_LOCK_H */ |