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) 2018 Lawrence Livermore National Security, LLC. 24 */ 25 26 #ifndef _ZFS_COMPILER_COMPAT_H 27 #define _ZFS_COMPILER_COMPAT_H 28 29 #include <linux/compiler.h> 30 31 #if !defined(zfs_fallthrough) 32 #if defined(HAVE_IMPLICIT_FALLTHROUGH) 33 #define zfs_fallthrough __attribute__((__fallthrough__)) 34 #else 35 #define zfs_fallthrough ((void)0) 36 #endif 37 #endif 38 39 #if !defined(READ_ONCE) 40 #define READ_ONCE(x) ACCESS_ONCE(x) 41 #endif 42 43 #endif /* _ZFS_COMPILER_COMPAT_H */ 44