1328653Shselasky/*- 2328653Shselasky * Copyright (c) 2017 Mellanox Technologies, Ltd. 3328653Shselasky * All rights reserved. 4328653Shselasky * 5328653Shselasky * Redistribution and use in source and binary forms, with or without 6328653Shselasky * modification, are permitted provided that the following conditions 7328653Shselasky * are met: 8328653Shselasky * 1. Redistributions of source code must retain the above copyright 9328653Shselasky * notice unmodified, this list of conditions, and the following 10328653Shselasky * disclaimer. 11328653Shselasky * 2. Redistributions in binary form must reproduce the above copyright 12328653Shselasky * notice, this list of conditions and the following disclaimer in the 13328653Shselasky * documentation and/or other materials provided with the distribution. 14328653Shselasky * 15328653Shselasky * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16328653Shselasky * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17328653Shselasky * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18328653Shselasky * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19328653Shselasky * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20328653Shselasky * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21328653Shselasky * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22328653Shselasky * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23328653Shselasky * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24328653Shselasky * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25328653Shselasky * 26328653Shselasky * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/mm_types.h 357436 2020-02-03 11:00:24Z hselasky $ 27328653Shselasky */ 28328653Shselasky 29328653Shselasky#ifndef _LINUX_MM_TYPES_H_ 30328653Shselasky#define _LINUX_MM_TYPES_H_ 31328653Shselasky 32328653Shselasky#include <linux/types.h> 33328653Shselasky#include <linux/page.h> 34328653Shselasky#include <linux/rwsem.h> 35328653Shselasky 36328653Shselasky#include <asm/atomic.h> 37328653Shselasky 38328653Shselaskystruct vm_area_struct; 39328653Shselaskystruct task_struct; 40328653Shselasky 41328653Shselaskystruct mm_struct { 42328653Shselasky struct vm_area_struct *mmap; 43328653Shselasky atomic_t mm_count; 44328653Shselasky atomic_t mm_users; 45328653Shselasky size_t pinned_vm; 46328653Shselasky struct rw_semaphore mmap_sem; 47328653Shselasky}; 48328653Shselasky 49328653Shselaskyextern void linux_mm_dtor(struct mm_struct *mm); 50328653Shselasky 51328653Shselaskystatic inline void 52328653Shselaskymmdrop(struct mm_struct *mm) 53328653Shselasky{ 54328653Shselasky if (__predict_false(atomic_dec_and_test(&mm->mm_count))) 55328653Shselasky linux_mm_dtor(mm); 56328653Shselasky} 57328653Shselasky 58357436Shselaskystatic inline bool 59357436Shselaskymmget_not_zero(struct mm_struct *mm) 60357436Shselasky{ 61357436Shselasky return (atomic_inc_not_zero(&mm->mm_users)); 62357436Shselasky} 63357436Shselasky 64328653Shselaskystatic inline void 65328653Shselaskymmput(struct mm_struct *mm) 66328653Shselasky{ 67328653Shselasky if (__predict_false(atomic_dec_and_test(&mm->mm_users))) 68328653Shselasky mmdrop(mm); 69328653Shselasky} 70328653Shselasky 71329960Shselaskystatic inline void 72329960Shselaskymmgrab(struct mm_struct *mm) 73329960Shselasky{ 74329960Shselasky atomic_inc(&mm->mm_count); 75329960Shselasky} 76329960Shselasky 77328653Shselaskyextern struct mm_struct *linux_get_task_mm(struct task_struct *); 78328653Shselasky#define get_task_mm(task) linux_get_task_mm(task) 79328653Shselasky 80328653Shselasky#endif /* _LINUX_MM_TYPES_H_ */ 81