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      1 /*	$NetBSD: mm.h,v 1.4 2021/12/19 12:22:28 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _LINUX_SCHED_MM_H_
     30 #define _LINUX_SCHED_MM_H_
     31 
     32 #include <sys/types.h>
     33 
     34 #include <uvm/uvm_extern.h>
     35 
     36 #include <linux/gfp.h>
     37 
     38 static inline void
     39 mmgrab(struct vmspace *vm)
     40 {
     41 	uvmspace_addref(vm);
     42 }
     43 
     44 static inline void
     45 mmdrop(struct vmspace *vm)
     46 {
     47 	uvmspace_free(vm);
     48 }
     49 
     50 static inline void
     51 fs_reclaim_acquire(gfp_t gfp)
     52 {
     53 }
     54 
     55 static inline void
     56 fs_reclaim_release(gfp_t gfp)
     57 {
     58 }
     59 
     60 static inline unsigned
     61 memalloc_nofs_save(void)
     62 {
     63 	return 0xeb13162c;
     64 }
     65 
     66 static inline void
     67 memalloc_nofs_restore(unsigned flags)
     68 {
     69 
     70 	KASSERT(flags == 0xeb13162c);
     71 }
     72 
     73 #endif	/* _LINUX_SCHED_MM_H_ */
     74