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/*-
* Copyright (c) 2017 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _LINUX_MM_TYPES_H_
#define _LINUX_MM_TYPES_H_
#include <linux/types.h>
#include <linux/page.h>
#include <linux/rwsem.h>
#include <asm/atomic.h>
struct vm_area_struct;
struct task_struct;
struct mm_struct {
struct vm_area_struct *mmap;
atomic_t mm_count;
atomic_t mm_users;
size_t pinned_vm;
struct rw_semaphore mmap_sem;
};
extern void linux_mm_dtor(struct mm_struct *mm);
static inline void
mmdrop(struct mm_struct *mm)
{
if (__predict_false(atomic_dec_and_test(&mm->mm_count)))
linux_mm_dtor(mm);
}
static inline void
mmput(struct mm_struct *mm)
{
if (__predict_false(atomic_dec_and_test(&mm->mm_users)))
mmdrop(mm);
}
extern struct mm_struct *linux_get_task_mm(struct task_struct *);
#define get_task_mm(task) linux_get_task_mm(task)
#endif /* _LINUX_MM_TYPES_H_ */
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