diff options
Diffstat (limited to 'arch/ia64/include/asm/mmiowb.h')
| -rw-r--r-- | arch/ia64/include/asm/mmiowb.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/mmiowb.h b/arch/ia64/include/asm/mmiowb.h new file mode 100644 index 0000000000..d67aab4ea3 --- /dev/null +++ b/arch/ia64/include/asm/mmiowb.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _ASM_IA64_MMIOWB_H +#define _ASM_IA64_MMIOWB_H + +/** + * mmiowb - I/O write barrier + * + * Ensure ordering of I/O space writes. This will make sure that writes + * following the barrier will arrive after all previous writes. For most + * ia64 platforms, this is a simple 'mf.a' instruction. + */ +#define mmiowb() ia64_mfa() + +#include <asm-generic/mmiowb.h> + +#endif /* _ASM_IA64_MMIOWB_H */ |