[linux-block.git] / include / linux / mmap_lock.h

#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);
}

#endif /* _LINUX_MMAP_LOCK_H */
Commit	Line	Data
9740ca4e ML	1	#ifndef _LINUX_MMAP_LOCK_H
	2	#define _LINUX_MMAP_LOCK_H
	3
42fc5414 ML	4	#include <linux/mmdebug.h>
42fc5414 ML	5
14c3656b	6	#define MMAP_LOCK_INITIALIZER(name) \
da1c55f1	7	.mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
14c3656b	8
9740ca4e ML	9	static inline void mmap_init_lock(struct mm_struct *mm)
9740ca4e ML	10	{
da1c55f1	11	init_rwsem(&mm->mmap_lock);
9740ca4e ML	12	}
	13
	14	static inline void mmap_write_lock(struct mm_struct *mm)
	15	{
da1c55f1	16	down_write(&mm->mmap_lock);
9740ca4e ML	17	}
9740ca4e ML	18
aaa2cc56 ML	19	static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
aaa2cc56 ML	20	{
da1c55f1	21	down_write_nested(&mm->mmap_lock, subclass);
aaa2cc56 ML	22	}
aaa2cc56 ML	23
9740ca4e ML	24	static inline int mmap_write_lock_killable(struct mm_struct *mm)
9740ca4e ML	25	{
da1c55f1	26	return down_write_killable(&mm->mmap_lock);
9740ca4e ML	27	}
	28
	29	static inline bool mmap_write_trylock(struct mm_struct *mm)
	30	{
da1c55f1	31	return down_write_trylock(&mm->mmap_lock) != 0;
9740ca4e ML	32	}
	33
	34	static inline void mmap_write_unlock(struct mm_struct *mm)
	35	{
da1c55f1	36	up_write(&mm->mmap_lock);
9740ca4e ML	37	}
	38
	39	static inline void mmap_write_downgrade(struct mm_struct *mm)
	40	{
da1c55f1	41	downgrade_write(&mm->mmap_lock);
9740ca4e ML	42	}
	43
	44	static inline void mmap_read_lock(struct mm_struct *mm)
	45	{
da1c55f1	46	down_read(&mm->mmap_lock);
9740ca4e ML	47	}
	48
	49	static inline int mmap_read_lock_killable(struct mm_struct *mm)
	50	{
da1c55f1	51	return down_read_killable(&mm->mmap_lock);
9740ca4e ML	52	}
	53
	54	static inline bool mmap_read_trylock(struct mm_struct *mm)
	55	{
da1c55f1	56	return down_read_trylock(&mm->mmap_lock) != 0;
9740ca4e ML	57	}
	58
	59	static inline void mmap_read_unlock(struct mm_struct *mm)
	60	{
da1c55f1	61	up_read(&mm->mmap_lock);
9740ca4e ML	62	}
9740ca4e ML	63
0cc55a02 ML	64	static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
0cc55a02 ML	65	{
da1c55f1 ML	66	if (down_read_trylock(&mm->mmap_lock)) {
da1c55f1 ML	67	rwsem_release(&mm->mmap_lock.dep_map, _RET_IP_);
0cc55a02 ML	68	return true;
	69	}
	70	return false;
	71	}
	72
	73	static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)
	74	{
da1c55f1	75	up_read_non_owner(&mm->mmap_lock);
0cc55a02 ML	76	}
0cc55a02 ML	77
42fc5414 ML	78	static inline void mmap_assert_locked(struct mm_struct *mm)
42fc5414 ML	79	{
da1c55f1 ML	80	lockdep_assert_held(&mm->mmap_lock);
da1c55f1 ML	81	VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
42fc5414 ML	82	}
	83
	84	static inline void mmap_assert_write_locked(struct mm_struct *mm)
	85	{
da1c55f1 ML	86	lockdep_assert_held_write(&mm->mmap_lock);
da1c55f1 ML	87	VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
42fc5414 ML	88	}
42fc5414 ML	89
9740ca4e	90	#endif /* _LINUX_MMAP_LOCK_H */