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Diffstat (limited to 'arch/arm/include/asm/atomic.h')
| -rw-r--r-- | arch/arm/include/asm/atomic.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/include/asm/atomic.h b/arch/arm/include/asm/atomic.h new file mode 100644 index 0000000..5822b0a --- /dev/null +++ b/arch/arm/include/asm/atomic.h @@ -0,0 +1,32 @@ +/* + * linux/include/asm-arm/atomic.h + * + * Copyright (c) 1996 Russell King. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Changelog: + * 27-06-1996 RMK Created + * 13-04-1997 RMK Made functions atomic! + * 07-12-1997 RMK Upgraded for v2.1. + * 26-08-1998 PJB Added #ifdef __KERNEL__ + */ +#ifndef __ASM_ARM_ATOMIC_H +#define __ASM_ARM_ATOMIC_H + +#ifdef CONFIG_SMP +#error SMP not supported +#endif + +#include <asm/proc-armv/system.h> +#include <asm-generic/atomic.h> + +/* Atomic operations are already serializing on ARM */ +#define smp_mb__before_atomic_dec() barrier() +#define smp_mb__after_atomic_dec() barrier() +#define smp_mb__before_atomic_inc() barrier() +#define smp_mb__after_atomic_inc() barrier() + +#endif |