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: / usr / src / kernels / 4.18.0-305.10.2.el8_4.x86_64 / include / linux /
Filename : mmap_lock.h
back
#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);
}

static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
{
	if (down_read_trylock(&mm->mmap_sem)) {
		rwsem_release(&mm->mmap_sem.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_sem);
}

#endif /* _LINUX_MMAP_LOCK_H */