linux-kernel - Re: [PATCH bpf-next] selftests/bpf: Fix the invalid operand for instruction issue

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Message-ID: <CAADnVQLQ4=sLwwzuzip+FoeW1RDxKtuhDRbBSnigeQ6O4w8m0g@mail.gmail.com>
Date: Tue, 26 Aug 2025 21:03:26 -0700
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Feng Yang <yangfeng59949@....com>
Cc: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, 
	John Fastabend <john.fastabend@...il.com>, Andrii Nakryiko <andrii@...nel.org>, 
	Martin KaFai Lau <martin.lau@...ux.dev>, Eduard <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, 
	Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, 
	bpf <bpf@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, 
	"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, clang-built-linux <llvm@...ts.linux.dev>
Subject: Re: [PATCH bpf-next] selftests/bpf: Fix the invalid operand for
 instruction issue

On Tue, Aug 26, 2025 at 8:16 PM Feng Yang <yangfeng59949@....com> wrote:
>
> From: Feng Yang <yangfeng@...inos.cn>
>
> The following issue occurs when compiling with clang version 17.0.6,
> but not with version 18.1.8. Add a version restriction to fix this problem.
>
> progs/compute_live_registers.c:251:3: error: invalid operand for instruction
>   251 |                 "r0 = 1;"
>       |                 ^
> <inline asm>:1:22: note: instantiated into assembly here
>     1 |         r0 = 1;r2 = 2;if r1 & 0x7 goto +1;exit;r0 = r2;exit;
>       |                             ^
> 1 error generated.

and once it compiles what happens next ?

pw-bot: cr