Hello:
This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Tue, 7 May 2024 02:02:49 +0200 you wrote:
> BPF_ATOMIC_OP() macro documentation states that "BPF_ADD | BPF_FETCH"
> should be the same as atomic_fetch_add(), which is currently not the
> case on s390x: the serialization instruction "bcr 14,0" is missing.
> This applies to "and", "or" and "xor" variants too.
>
> s390x is allowed to reorder stores with subsequent fetches from
> different addresses, so code relying on BPF_FETCH acting as a barrier,
> for example:
>
> [...]
Here is the summary with links:
- [bpf-next,v2] s390/bpf: Emit a barrier for BPF_FETCH instructions
https://git.kernel.org/bpf/bpf-next/c/68378982f0b2
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
