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Date: Fri, 01 Dec 2023 18:13:22 +0200
From: Eduard Zingerman <>
To: Daniel Xu <>
Subject: Re: [PATCH ipsec-next v2 3/6] libbpf: Add BPF_CORE_WRITE_BITFIELD()

On Thu, 2023-11-30 at 18:33 -0700, Daniel Xu wrote:
> Good call about adding tests -- I found a few bugs with the code from
> the other thread. But boy did they take a lot of brain cells to figure
> out.
> There was some 6th grade algebra involved too -- I'll do my best to
> explain it in the commit msg for v3.
> Here are the fixes in case you are curious:

Ouch, I knew my code from 3am can't be trusted, sorry for that.
Your math seem to make sense, thank you.


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