From: Chenghao Duan <duanchenghao@kylinos.cn>
To: Vincent Li <vincent.mc.li@gmail.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>, loongarch@lists.linux.dev
Subject: Re: bpf selftest build error - undeclared function 'bpf_qdisc_skb_drop'
Date: Thu, 31 Jul 2025 10:29:58 +0800 [thread overview]
Message-ID: <20250731022958.GA190477@chenghao-pc> (raw)
In-Reply-To: <CAK3+h2z3Zx+0KbVcRbLuz_-LhBwov9Bmvp9HdumbaN5GYtovFg@mail.gmail.com>
On Wed, Jul 30, 2025 at 07:21:52PM -0700, Vincent Li wrote:
> Hi Tiezhu and Chenghao,
>
> While attempting to test the bpf trampoline patches on loongarch on
> top of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git,
> I ran into bpf selftest build error irrelevant to the bpf trampoline
>
> CLNG-BPF [test_progs] bpf_qdisc_fail__incompl_ops.bpf.o
> progs/bpf_qdisc_fail__incompl_ops.c:13:2: error: call to undeclared
> function 'bpf_qdisc_skb_drop'; ISO C99 and later do not support
> implicit function declarations [-Wimplicit-function-declaration]
> 13 | bpf_qdisc_skb_drop(skb, to_free);
> | ^
>
> I am on Fedora 38 ( I should have updated to newer Fedora :)) with
> clang version 18.1.0rc, not sure if it is related, wonder if you guys
> have run into similar issues.
>
> Vincent
Hi Vincent,
Yes, I have encountered a similar issue. My approach is to temporarily
block or comment out the test code that is unrelated to the trampoline
test.
Chenghao
next prev parent reply other threads:[~2025-07-31 2:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-31 2:21 bpf selftest build error - undeclared function 'bpf_qdisc_skb_drop' Vincent Li
2025-07-31 2:29 ` Tiezhu Yang
2025-07-31 2:59 ` Vincent Li
2025-07-31 2:29 ` Chenghao Duan [this message]
2025-07-31 3:08 ` Vincent Li
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