1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495 |
- #ifndef _LINUX_MMAP_LOCK_H
- #define _LINUX_MMAP_LOCK_H
- #include <linux/mmdebug.h>
- #define MMAP_LOCK_INITIALIZER(name) \
- .mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
- static inline void mmap_init_lock(struct mm_struct *mm)
- {
- init_rwsem(&mm->mmap_lock);
- }
- static inline void mmap_write_lock(struct mm_struct *mm)
- {
- down_write(&mm->mmap_lock);
- }
- static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
- {
- down_write_nested(&mm->mmap_lock, subclass);
- }
- static inline int mmap_write_lock_killable(struct mm_struct *mm)
- {
- return down_write_killable(&mm->mmap_lock);
- }
- static inline bool mmap_write_trylock(struct mm_struct *mm)
- {
- return down_write_trylock(&mm->mmap_lock) != 0;
- }
- static inline void mmap_write_unlock(struct mm_struct *mm)
- {
- up_write(&mm->mmap_lock);
- }
- static inline void mmap_write_downgrade(struct mm_struct *mm)
- {
- downgrade_write(&mm->mmap_lock);
- }
- static inline void mmap_read_lock(struct mm_struct *mm)
- {
- down_read(&mm->mmap_lock);
- }
- static inline int mmap_read_lock_killable(struct mm_struct *mm)
- {
- return down_read_killable(&mm->mmap_lock);
- }
- static inline bool mmap_read_trylock(struct mm_struct *mm)
- {
- return down_read_trylock(&mm->mmap_lock) != 0;
- }
- static inline void mmap_read_unlock(struct mm_struct *mm)
- {
- up_read(&mm->mmap_lock);
- }
- static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
- {
- if (down_read_trylock(&mm->mmap_lock)) {
- rwsem_release(&mm->mmap_lock.dep_map, _RET_IP_);
- return true;
- }
- return false;
- }
- static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)
- {
- up_read_non_owner(&mm->mmap_lock);
- }
- static inline void mmap_assert_locked(struct mm_struct *mm)
- {
- lockdep_assert_held(&mm->mmap_lock);
- VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
- }
- static inline void mmap_assert_write_locked(struct mm_struct *mm)
- {
- lockdep_assert_held_write(&mm->mmap_lock);
- VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
- }
- static inline int mmap_lock_is_contended(struct mm_struct *mm)
- {
- return rwsem_is_contended(&mm->mmap_lock);
- }
- #endif /* _LINUX_MMAP_LOCK_H */
|