8 #include <linux/tracepoint-defs.h>
20 void __mmap_lock_do_trace_start_locking(struct mm_struct *mm, bool write);
21 void __mmap_lock_do_trace_acquire_returned(struct mm_struct *mm, bool write,
23 void __mmap_lock_do_trace_released(struct mm_struct *mm, bool write);
25 static inline void __mmap_lock_trace_start_locking(struct mm_struct *mm,  in __mmap_lock_trace_start_locking()  argument
29 		__mmap_lock_do_trace_start_locking(mm, write);  in __mmap_lock_trace_start_locking()
32 static inline void __mmap_lock_trace_acquire_returned(struct mm_struct *mm,  in __mmap_lock_trace_acquire_returned()  argument
36 		__mmap_lock_do_trace_acquire_returned(mm, write, success);  in __mmap_lock_trace_acquire_returned()
39 static inline void __mmap_lock_trace_released(struct mm_struct *mm, bool write)  in __mmap_lock_trace_released()  argument
42 		__mmap_lock_do_trace_released(mm, write);  in __mmap_lock_trace_released()
47 static inline void __mmap_lock_trace_start_locking(struct mm_struct *mm,  in __mmap_lock_trace_start_locking()  argument
52 static inline void __mmap_lock_trace_acquire_returned(struct mm_struct *mm,  in __mmap_lock_trace_acquire_returned()  argument
57 static inline void __mmap_lock_trace_released(struct mm_struct *mm, bool write)  in __mmap_lock_trace_released()  argument
63 static inline void mmap_assert_locked(const struct mm_struct *mm)  in mmap_assert_locked()  argument
65 	rwsem_assert_held(&mm->mmap_lock);  in mmap_assert_locked()
68 static inline void mmap_assert_write_locked(const struct mm_struct *mm)  in mmap_assert_write_locked()  argument
70 	rwsem_assert_held_write(&mm->mmap_lock);  in mmap_assert_write_locked()
75 static inline void mm_lock_seqcount_init(struct mm_struct *mm)  in mm_lock_seqcount_init()  argument
77 	seqcount_init(&mm->mm_lock_seq);  in mm_lock_seqcount_init()
80 static inline void mm_lock_seqcount_begin(struct mm_struct *mm)  in mm_lock_seqcount_begin()  argument
82 	do_raw_write_seqcount_begin(&mm->mm_lock_seq);  in mm_lock_seqcount_begin()
85 static inline void mm_lock_seqcount_end(struct mm_struct *mm)  in mm_lock_seqcount_end()  argument
87 	ASSERT_EXCLUSIVE_WRITER(mm->mm_lock_seq);  in mm_lock_seqcount_end()
88 	do_raw_write_seqcount_end(&mm->mm_lock_seq);  in mm_lock_seqcount_end()
91 static inline bool mmap_lock_speculate_try_begin(struct mm_struct *mm, unsigned int *seq)  in mmap_lock_speculate_try_begin()  argument
96 	 * bother with the speculative path if mmap_lock is already write-locked  in mmap_lock_speculate_try_begin()
99 	return raw_seqcount_try_begin(&mm->mm_lock_seq, *seq);  in mmap_lock_speculate_try_begin()
102 static inline bool mmap_lock_speculate_retry(struct mm_struct *mm, unsigned int seq)  in mmap_lock_speculate_retry()  argument
104 	return read_seqcount_retry(&mm->mm_lock_seq, seq);  in mmap_lock_speculate_retry()
109 static inline void mm_lock_seqcount_init(struct mm_struct *mm) {}  in mm_lock_seqcount_init()  argument
110 static inline void mm_lock_seqcount_begin(struct mm_struct *mm) {}  in mm_lock_seqcount_begin()  argument
111 static inline void mm_lock_seqcount_end(struct mm_struct *mm) {}  in mm_lock_seqcount_end()  argument
113 static inline bool mmap_lock_speculate_try_begin(struct mm_struct *mm, unsigned int *seq)  in mmap_lock_speculate_try_begin()  argument
118 static inline bool mmap_lock_speculate_retry(struct mm_struct *mm, unsigned int seq)  in mmap_lock_speculate_retry()  argument
125 static inline void mmap_write_lock(struct mm_struct *mm)  in mmap_write_lock()  argument
127 	__mmap_lock_trace_start_locking(mm, true);  in mmap_write_lock()
128 	down_write(&mm->mmap_lock);  in mmap_write_lock()
129 	mm_lock_seqcount_begin(mm);  in mmap_write_lock()
130 	__mmap_lock_trace_acquire_returned(mm, true, true);  in mmap_write_lock()
133 static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)  in mmap_write_lock_nested()  argument
135 	__mmap_lock_trace_start_locking(mm, true);  in mmap_write_lock_nested()
136 	down_write_nested(&mm->mmap_lock, subclass);  in mmap_write_lock_nested()
137 	mm_lock_seqcount_begin(mm);  in mmap_write_lock_nested()
138 	__mmap_lock_trace_acquire_returned(mm, true, true);  in mmap_write_lock_nested()
141 static inline int mmap_write_lock_killable(struct mm_struct *mm)  in mmap_write_lock_killable()  argument
145 	__mmap_lock_trace_start_locking(mm, true);  in mmap_write_lock_killable()
146 	ret = down_write_killable(&mm->mmap_lock);  in mmap_write_lock_killable()
148 		mm_lock_seqcount_begin(mm);  in mmap_write_lock_killable()
149 	__mmap_lock_trace_acquire_returned(mm, true, ret == 0);  in mmap_write_lock_killable()
154  * Drop all currently-held per-VMA locks.
156  * a write-locked mmap_lock (or downgrading it to read-locked).
161 static inline void vma_end_write_all(struct mm_struct *mm)  in vma_end_write_all()  argument
163 	mmap_assert_write_locked(mm);  in vma_end_write_all()
164 	mm_lock_seqcount_end(mm);  in vma_end_write_all()
167 static inline void mmap_write_unlock(struct mm_struct *mm)  in mmap_write_unlock()  argument
169 	__mmap_lock_trace_released(mm, true);  in mmap_write_unlock()
170 	vma_end_write_all(mm);  in mmap_write_unlock()
171 	up_write(&mm->mmap_lock);  in mmap_write_unlock()
174 static inline void mmap_write_downgrade(struct mm_struct *mm)  in mmap_write_downgrade()  argument
176 	__mmap_lock_trace_acquire_returned(mm, false, true);  in mmap_write_downgrade()
177 	vma_end_write_all(mm);  in mmap_write_downgrade()
178 	downgrade_write(&mm->mmap_lock);  in mmap_write_downgrade()
181 static inline void mmap_read_lock(struct mm_struct *mm)  in mmap_read_lock()  argument
183 	__mmap_lock_trace_start_locking(mm, false);  in mmap_read_lock()
184 	down_read(&mm->mmap_lock);  in mmap_read_lock()
185 	__mmap_lock_trace_acquire_returned(mm, false, true);  in mmap_read_lock()
188 static inline int mmap_read_lock_killable(struct mm_struct *mm)  in mmap_read_lock_killable()  argument
192 	__mmap_lock_trace_start_locking(mm, false);  in mmap_read_lock_killable()
193 	ret = down_read_killable(&mm->mmap_lock);  in mmap_read_lock_killable()
194 	__mmap_lock_trace_acquire_returned(mm, false, ret == 0);  in mmap_read_lock_killable()
198 static inline bool mmap_read_trylock(struct mm_struct *mm)  in mmap_read_trylock()  argument
202 	__mmap_lock_trace_start_locking(mm, false);  in mmap_read_trylock()
203 	ret = down_read_trylock(&mm->mmap_lock) != 0;  in mmap_read_trylock()
204 	__mmap_lock_trace_acquire_returned(mm, false, ret);  in mmap_read_trylock()
208 static inline void mmap_read_unlock(struct mm_struct *mm)  in mmap_read_unlock()  argument
210 	__mmap_lock_trace_released(mm, false);  in mmap_read_unlock()
211 	up_read(&mm->mmap_lock);  in mmap_read_unlock()
214 static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)  in mmap_read_unlock_non_owner()  argument
216 	__mmap_lock_trace_released(mm, false);  in mmap_read_unlock_non_owner()
217 	up_read_non_owner(&mm->mmap_lock);  in mmap_read_unlock_non_owner()
220 static inline int mmap_lock_is_contended(struct mm_struct *mm)  in mmap_lock_is_contended()  argument
222 	return rwsem_is_contended(&mm->mmap_lock);  in mmap_lock_is_contended()