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 <asm-generic/mmiowb.h> 13 14 #endif /* _ASM_RISCV_MMIOWB_H */ 15