Re: [PATCH] KVM: selftests: Double check on the current CPU in rseq_test

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On 7/14/22 17:35, Sean Christopherson wrote:
Can you check that smp_rmb() and smp_wmb() generate correct instructions on
arm64?

That seems like the most likely scenario (or a kernel bug), I distinctly remember
the barriers provided by tools/ being rather bizarre.

Maybe we should bite the bait and use C11 atomics in tools/. I've long planned an article "C11 atomics for kernel programmers", especially because this will also be an issue when Rust gets into the mix...

Paolo




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