f0ea57c2d7
* Based on S666LN-MA66BABCDEFLMNQ-T-OP-240322V1005 * Imported kernel-headers for dummy Change-Id: I639796c449784d67edc65d7f38cf7d7119d117d2 Signed-off-by: fjrXTR <fajarslebew31@gmail.com>
96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
#ifndef _LINUX_MMAP_LOCK_H
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#define _LINUX_MMAP_LOCK_H
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#include <linux/mmdebug.h>
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#define MMAP_LOCK_INITIALIZER(name) \
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.mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
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static inline void mmap_init_lock(struct mm_struct *mm)
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{
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init_rwsem(&mm->mmap_lock);
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}
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static inline void mmap_write_lock(struct mm_struct *mm)
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{
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down_write(&mm->mmap_lock);
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}
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static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
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{
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down_write_nested(&mm->mmap_lock, subclass);
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}
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static inline int mmap_write_lock_killable(struct mm_struct *mm)
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{
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return down_write_killable(&mm->mmap_lock);
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}
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static inline bool mmap_write_trylock(struct mm_struct *mm)
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{
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return down_write_trylock(&mm->mmap_lock) != 0;
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}
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static inline void mmap_write_unlock(struct mm_struct *mm)
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{
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up_write(&mm->mmap_lock);
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}
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static inline void mmap_write_downgrade(struct mm_struct *mm)
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{
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downgrade_write(&mm->mmap_lock);
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}
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static inline void mmap_read_lock(struct mm_struct *mm)
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{
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down_read(&mm->mmap_lock);
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}
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static inline int mmap_read_lock_killable(struct mm_struct *mm)
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{
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return down_read_killable(&mm->mmap_lock);
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}
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static inline bool mmap_read_trylock(struct mm_struct *mm)
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{
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return down_read_trylock(&mm->mmap_lock) != 0;
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}
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static inline void mmap_read_unlock(struct mm_struct *mm)
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{
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up_read(&mm->mmap_lock);
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}
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static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
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{
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if (down_read_trylock(&mm->mmap_lock)) {
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rwsem_release(&mm->mmap_lock.dep_map, _RET_IP_);
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return true;
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}
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return false;
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}
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static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)
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{
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up_read_non_owner(&mm->mmap_lock);
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}
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static inline void mmap_assert_locked(struct mm_struct *mm)
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{
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lockdep_assert_held(&mm->mmap_lock);
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VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
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}
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static inline void mmap_assert_write_locked(struct mm_struct *mm)
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{
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lockdep_assert_held_write(&mm->mmap_lock);
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VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
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}
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static inline int mmap_lock_is_contended(struct mm_struct *mm)
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{
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return rwsem_is_contended(&mm->mmap_lock);
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}
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#endif /* _LINUX_MMAP_LOCK_H */
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