linux-kernel - Re: [PATCH v2] selftests: sched_ext: Add sched

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Message-ID: <ZwQKRe7iIzZjjEQd@finisterre.sirena.org.uk>
Date: Mon, 7 Oct 2024 17:20:21 +0100
From: Mark Brown <broonie@...nel.org>
To: Björn Töpel <bjorn@...nel.org>
Cc: Tejun Heo <tj@...nel.org>, David Vernet <void@...ifault.com>,
	Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Björn Töpel <bjorn@...osinc.com>,
	bpf@...r.kernel.org, linux-riscv@...ts.infradead.org,
	Anders Roxell <anders.roxell@...aro.org>
Subject: Re: [PATCH v2] selftests: sched_ext: Add sched_ext as proper
 selftest target

On Mon, Oct 07, 2024 at 06:00:57PM +0200, Björn Töpel wrote:
> Mark Brown <broonie@...nel.org> writes:
> > On Mon, Oct 07, 2024 at 09:31:32AM +0200, Björn Töpel wrote:

> >   CLNG-BPF create_dsq.bpf.o
> > In file included from create_dsq.bpf.c:9:
> > /home/broonie/git/linux/tools/sched_ext/include/scx/common.bpf.h:33:17: error: use of undeclared identifier 'SCX_DSQ_FLAG_BUILTIN'
> >    33 |         _Static_assert(SCX_DSQ_FLAG_BUILTIN,
> >       |                        ^

> This is most likely due to incorrect VMLINUX_BTF_PATHS, so that
> vmlinux.h is incorrectly generated. Try grepping for
> SCX_DSQ_FLAG_BUILTIN in vmlinux.h.

Yeah, it's not in the generated files:

broonie@...isterre:~/git/linux$ grep SCX_DSQ_FLAG_BUILTIN ./tools/testing/selftests/sched_ext/build/include/vmlinux.h ./tools/testing/selftests/sched_ext/build/obj/bpftool/vmlinux.h
broonie@...isterre:~/git/linux$ 

I didn't actually build a kernel, if the build system needs a kernel
it's just silently not detected that it's missing?

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