1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright (C) 2018 Lawrence Livermore National Security, LLC. 25 */ 26 27 #ifndef _ZFS_COMPILER_COMPAT_H 28 #define _ZFS_COMPILER_COMPAT_H 29 30 #include <linux/compiler.h> 31 32 #if !defined(zfs_fallthrough) 33 #if defined(HAVE_IMPLICIT_FALLTHROUGH) 34 #define zfs_fallthrough __attribute__((__fallthrough__)) 35 #else 36 #define zfs_fallthrough ((void)0) 37 #endif 38 #endif 39 40 #if !defined(READ_ONCE) 41 #define READ_ONCE(x) ACCESS_ONCE(x) 42 #endif 43 44 #endif /* _ZFS_COMPILER_COMPAT_H */ 45