riscv, bpf: Enable inline bpf_kptr_xchg() for RV64

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RV64 JIT supports 64-bit BPF_XCHG atomic instructions. At the same time,
the underlying implementation of xchg() and atomic64_xchg() in RV64 both
are raw_xchg() that supported 64-bit. Therefore inline bpf_kptr_xchg()
will have equivalent semantics. Let's inline it for better performance.

Signed-off-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/bpf/20240130124659.670321-2-pulehui@huaweicloud.com

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Pu Lehui 2024-01-30 12:46:58 +00:00 • committed by Daniel Borkmann

parent 088a464ed5

commit 69065aa11c

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arch/riscv/net/bpf_jit_comp64.c

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