tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#ifndef __ASM_BARRIER_H
10#define __ASM_BARRIER_H
11
12#ifndef __ASSEMBLY__
13
14/* TODO-vineetg: Need to see what this does, don't we need sync anywhere */
15#define mb() __asm__ __volatile__ ("" : : : "memory")
16#define rmb() mb()
17#define wmb() mb()
18#define set_mb(var, value) do { var = value; mb(); } while (0)
19#define set_wmb(var, value) do { var = value; wmb(); } while (0)
20#define read_barrier_depends() mb()
21
22/* TODO-vineetg verify the correctness of macros here */
23#ifdef CONFIG_SMP
24#define smp_mb() mb()
25#define smp_rmb() rmb()
26#define smp_wmb() wmb()
27#else
28#define smp_mb() barrier()
29#define smp_rmb() barrier()
30#define smp_wmb() barrier()
31#endif
32
33#define smp_mb__before_atomic_dec() barrier()
34#define smp_mb__after_atomic_dec() barrier()
35#define smp_mb__before_atomic_inc() barrier()
36#define smp_mb__after_atomic_inc() barrier()
37
38#define smp_read_barrier_depends() do { } while (0)
39
40#endif
41
42#endif