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c85688e2b0
Disparate fence implementations are consolidated into fence.h. Also introduce RISCV_FENCE_ASM to make fence macro more reusable. Signed-off-by: Eric Chan <ericchancf@google.com> Reviewed-by: Andrea Parri <parri.andrea@gmail.com> Reviewed-by: Samuel Holland <samuel.holland@sifive.com> Tested-by: Samuel Holland <samuel.holland@sifive.com> Link: https://lore.kernel.org/r/20240217131316.3668927-1-ericchancf@google.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
15 lines
365 B
C
15 lines
365 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_RISCV_MMIOWB_H
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#define _ASM_RISCV_MMIOWB_H
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/*
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* "o,w" is sufficient to ensure that all writes to the device have completed
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* before the write to the spinlock is allowed to commit.
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*/
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#define mmiowb() RISCV_FENCE(o, w)
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#include <linux/smp.h>
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#include <asm-generic/mmiowb.h>
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#endif /* _ASM_RISCV_MMIOWB_H */
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