1 #ifndef _LINUX_MMAP_LOCK_H
2 #define _LINUX_MMAP_LOCK_H
4 static inline void mmap_init_lock(struct mm_struct *mm)
6 init_rwsem(&mm->mmap_sem);
9 static inline void mmap_write_lock(struct mm_struct *mm)
11 down_write(&mm->mmap_sem);
14 static inline int mmap_write_lock_killable(struct mm_struct *mm)
16 return down_write_killable(&mm->mmap_sem);
19 static inline bool mmap_write_trylock(struct mm_struct *mm)
21 return down_write_trylock(&mm->mmap_sem) != 0;
24 static inline void mmap_write_unlock(struct mm_struct *mm)
26 up_write(&mm->mmap_sem);
29 static inline void mmap_write_downgrade(struct mm_struct *mm)
31 downgrade_write(&mm->mmap_sem);
34 static inline void mmap_read_lock(struct mm_struct *mm)
36 down_read(&mm->mmap_sem);
39 static inline int mmap_read_lock_killable(struct mm_struct *mm)
41 return down_read_killable(&mm->mmap_sem);
44 static inline bool mmap_read_trylock(struct mm_struct *mm)
46 return down_read_trylock(&mm->mmap_sem) != 0;
49 static inline void mmap_read_unlock(struct mm_struct *mm)
51 up_read(&mm->mmap_sem);
54 #endif /* _LINUX_MMAP_LOCK_H */