linux-kernel - Re: [PATCH v2] libbpf: add GCC support for bpf_tail_call

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Message-Id: <166197241711.25924.12874489815667312350.git-patchwork-notify@kernel.org>
Date:   Wed, 31 Aug 2022 19:00:17 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     James Hilliard <james.hilliard1@...il.com>
Cc:     bpf@...r.kernel.org, andrii@...nel.org, ast@...nel.org,
        daniel@...earbox.net, martin.lau@...ux.dev, song@...nel.org,
        yhs@...com, john.fastabend@...il.com, kpsingh@...nel.org,
        sdf@...gle.com, haoluo@...gle.com, jolsa@...nel.org,
        nathan@...nel.org, ndesaulniers@...gle.com, trix@...hat.com,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH v2] libbpf: add GCC support for bpf_tail_call_static

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Mon, 29 Aug 2022 15:05:46 -0600 you wrote:
> The bpf_tail_call_static function is currently not defined unless
> using clang >= 8.
> 
> To support bpf_tail_call_static on GCC we can check if __clang__ is
> not defined to enable bpf_tail_call_static.
> 
> We need to use GCC assembly syntax when the compiler does not define
> __clang__ as LLVM inline assembly is not fully compatible with GCC.
> 
> [...]

Here is the summary with links:
  - [v2] libbpf: add GCC support for bpf_tail_call_static
    https://git.kernel.org/bpf/bpf-next/c/14e5ce79943a

You are awesome, thank you!
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