linux-kernel - Re: [PATCH bpf-next] bpf: Build-time assert that cpumask offset is zero

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Date:   Sat, 28 Jan 2023 20:30:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     David Vernet <void@...ifault.com>
Cc:     bpf@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
        yhs@...a.com, john.fastabend@...il.com, kpsingh@...nel.org,
        sdf@...gle.com, haoluo@...gle.com, jolsa@...nel.org,
        linux-kernel@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH bpf-next] bpf: Build-time assert that cpumask offset is zero

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Sat, 28 Jan 2023 08:15:37 -0600 you wrote:
> The first element of a struct bpf_cpumask is a cpumask_t. This is done
> to allow struct bpf_cpumask to be cast to a struct cpumask. If this
> element were ever moved to another field, any BPF program passing a
> struct bpf_cpumask * to a kfunc expecting a const struct cpumask * would
> immediately fail to load. Add a build-time assertion so this is
> assumption is captured and verified.
> 
> [...]

Here is the summary with links:
  - [bpf-next] bpf: Build-time assert that cpumask offset is zero
    https://git.kernel.org/bpf/bpf-next/c/cb4a21ea592f

You are awesome, thank you!
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