diff options
Diffstat (limited to 'include/linux/compiler_compat.h')
| -rw-r--r-- | include/linux/compiler_compat.h | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/include/linux/compiler_compat.h b/include/linux/compiler_compat.h deleted file mode 100644 index 696d79572..000000000 --- a/include/linux/compiler_compat.h +++ /dev/null @@ -1,47 +0,0 @@ -/* - * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. - * Copyright (C) 2007 The Regents of the University of California. - * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). - * Written by Brian Behlendorf <[email protected]>. - * UCRL-CODE-235197 - * - * This file is part of the SPL, Solaris Porting Layer. - * For details, see <http://zfsonlinux.org/>. - * - * The SPL is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * The SPL is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License along - * with the SPL. If not, see <http://www.gnu.org/licenses/>. - */ - -#ifndef _SPL_COMPILER_COMPAT_H -#define _SPL_COMPILER_COMPAT_H - -#include <linux/compiler.h> - -#ifndef ACCESS_ONCE -/* - * Prevent the compiler from merging or refetching accesses. The compiler - * is also forbidden from reordering successive instances of ACCESS_ONCE(), - * but only when the compiler is aware of some particular ordering. One way - * to make the compiler aware of ordering is to put the two invocations of - * ACCESS_ONCE() in different C statements. - * - * This macro does absolutely -nothing- to prevent the CPU from reordering, - * merging, or refetching absolutely anything at any time. Its main intended - * use is to mediate communication between process-level code and irq/NMI - * handlers, all running on the same CPU. - */ -/* Taken from 2.6.33.2 */ -#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x)) -#endif - -#endif /* _SPL_COMPILER_COMPAT_H */ |