linux-kernel - Re: [PATCH] sched_ext: Fix the incorrect bpf

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Message-ID: <Z64iRW-yJeTm49u3@slm.duckdns.org>
Date: Thu, 13 Feb 2025 06:48:05 -1000
From: Tejun Heo <tj@...nel.org>
To: Chuyi Zhou <zhouchuyi@...edance.com>
Cc: void@...ifault.com, arighi@...dia.com, changwoo@...lia.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched_ext: Fix the incorrect bpf_list kfunc API in
 common.bpf.h.

On Wed, Feb 12, 2025 at 03:19:36PM +0800, Chuyi Zhou wrote:
> Now BPF only supports bpf_list_push_{front,back}_impl kfunc, not bpf_list_
> push_{front,back}.
> 
> This patch fix this issue. Without this patch, if we use bpf_list kfunc
> in scx, the BPF verifier would complain:
> 
> libbpf: extern (func ksym) 'bpf_list_push_back': not found in kernel or
> module BTFs
> libbpf: failed to load object 'scx_foo'
> libbpf: failed to load BPF skeleton 'scx_foo': -EINVAL
> 
> With this patch, the bpf list kfunc will work as expected.
> 
> Signed-off-by: Chuyi Zhou <zhouchuyi@...edance.com>

Applied to sched_ext/for-6.14-fixes.

Thanks.

-- 
tejun