tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001 - 2012 Tensilica Inc.
7 */
8
9#ifndef _XTENSA_SYSTEM_H
10#define _XTENSA_SYSTEM_H
11
12#define smp_read_barrier_depends() do { } while(0)
13#define read_barrier_depends() do { } while(0)
14
15#define mb() ({ __asm__ __volatile__("memw" : : : "memory"); })
16#define rmb() barrier()
17#define wmb() mb()
18
19#ifdef CONFIG_SMP
20#error smp_* not defined
21#else
22#define smp_mb() barrier()
23#define smp_rmb() barrier()
24#define smp_wmb() barrier()
25#endif
26
27#define set_mb(var, value) do { var = value; mb(); } while (0)
28
29#endif /* _XTENSA_SYSTEM_H */