| #ifndef _LINUX_MMAP_LOCK_H |
| #define _LINUX_MMAP_LOCK_H |
| |
| static inline void mmap_init_lock(struct mm_struct *mm) |
| { |
| init_rwsem(&mm->mmap_sem); |
| } |
| |
| static inline void mmap_write_lock(struct mm_struct *mm) |
| { |
| down_write(&mm->mmap_sem); |
| } |
| |
| static inline int mmap_write_lock_killable(struct mm_struct *mm) |
| { |
| return down_write_killable(&mm->mmap_sem); |
| } |
| |
| static inline bool mmap_write_trylock(struct mm_struct *mm) |
| { |
| return down_write_trylock(&mm->mmap_sem) != 0; |
| } |
| |
| static inline void mmap_write_unlock(struct mm_struct *mm) |
| { |
| up_write(&mm->mmap_sem); |
| } |
| |
| static inline void mmap_write_downgrade(struct mm_struct *mm) |
| { |
| downgrade_write(&mm->mmap_sem); |
| } |
| |
| static inline void mmap_read_lock(struct mm_struct *mm) |
| { |
| down_read(&mm->mmap_sem); |
| } |
| |
| static inline int mmap_read_lock_killable(struct mm_struct *mm) |
| { |
| return down_read_killable(&mm->mmap_sem); |
| } |
| |
| static inline bool mmap_read_trylock(struct mm_struct *mm) |
| { |
| return down_read_trylock(&mm->mmap_sem) != 0; |
| } |
| |
| static inline void mmap_read_unlock(struct mm_struct *mm) |
| { |
| up_read(&mm->mmap_sem); |
| } |
| |
| #endif /* _LINUX_MMAP_LOCK_H */ |