Hello:
This patch was applied to bpf/bpf.git (refs/heads/master):
On Fri, 19 Mar 2021 17:00:01 -0700 you wrote:
> __bpf_arch_text_poke does rewrite only for atomic nop5, emit_nops(xxx, 5)
> emits non-atomic one which breaks fentry/fexit with k8 atomics:
>
> P6_NOP5 == P6_NOP5_ATOMIC (0f1f440000 == 0f1f440000)
> K8_NOP5 != K8_NOP5_ATOMIC (6666906690 != 6666666690)
>
> Can be reproduced by doing "ideal_nops = k8_nops" in "arch_init_ideal_nops()
> and running fexit_bpf2bpf selftest.
>
> [...]
Here is the summary with links:
- [bpf] bpf: use NOP_ATOMIC5 instead of emit_nops(&prog, 5) for BPF_TRAMP_F_CALL_ORIG
https://git.kernel.org/bpf/bpf/c/b90829704780
You are awesome, thank you!
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