1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2023, 2024, Klara Inc. 24 * Copyright (c) 2024, Rob Norris <[email protected]> 25 */ 26 27 #ifndef _ZFS_MM_COMPAT_H 28 #define _ZFS_MM_COMPAT_H 29 30 #include <linux/mm.h> 31 #include <linux/pagemap.h> 32 33 /* 5.4 introduced page_size(). Older kernels can use a trivial macro instead */ 34 #ifndef HAVE_MM_PAGE_SIZE 35 #define page_size(p) ((unsigned long)(PAGE_SIZE << compound_order(p))) 36 #endif 37 38 /* 6.11 removed page_mapping(). A simple wrapper around folio_mapping() works */ 39 #ifndef HAVE_MM_PAGE_MAPPING 40 #define page_mapping(p) folio_mapping(page_folio(p)) 41 #endif 42 43 #endif /* _ZFS_MM_COMPAT_H */ 44