1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef _ASM_RISCV_MMIOWB_H
4 #define _ASM_RISCV_MMIOWB_H
5 
6 /*
7  * "o,w" is sufficient to ensure that all writes to the device have completed
8  * before the write to the spinlock is allowed to commit.
9  */
10 #define mmiowb()	__asm__ __volatile__ ("fence o,w" : : : "memory");
11 
12 #include <linux/smp.h>
13 #include <asm-generic/mmiowb.h>
14 
15 #endif	/* _ASM_RISCV_MMIOWB_H */
16