riscv/barrier: Define RISCV_FULL_BARRIER

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Introduce RISCV_FULL_BARRIER and use in arch_atomic* function.
like RISCV_ACQUIRE_BARRIER and RISCV_RELEASE_BARRIER, the fence
instruction can be eliminated When SMP is not enabled.

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/20240217131302.3668481-1-ericchancf@google.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

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Eric Chan 2024-02-17 13:13:02 +00:00 • committed by Palmer Dabbelt

parent 89f4fd7b1a

commit b3c8064ccc

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16

arch/riscv/include/asm/atomic.h

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4

arch/riscv/include/asm/cmpxchg.h

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2

arch/riscv/include/asm/fence.h

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