linux-kernel - Re: [PATCH bpf-next 2/3] bpf, riscv: add fsession support for trampolines

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Message-ID: <5088614.31r3eYUQgx@7950hx>
Date: Fri, 06 Feb 2026 20:07:35 +0800
From: Menglong Dong <menglong.dong@...ux.dev>
To: Menglong Dong <menglong8.dong@...il.com>,
 Björn Töpel <bjorn@...nel.org>
Cc: ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
 martin.lau@...ux.dev, eddyz87@...il.com, song@...nel.org,
 yonghong.song@...ux.dev, john.fastabend@...il.com, kpsingh@...nel.org,
 sdf@...ichev.me, haoluo@...gle.com, jolsa@...nel.org, pulehui@...wei.com,
 puranjay@...nel.org, pjw@...nel.org, palmer@...belt.com,
 aou@...s.berkeley.edu, alex@...ti.fr, jiang.biao@...ux.dev,
 bpf@...r.kernel.org, linux-riscv@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next 2/3] bpf,
 riscv: add fsession support for trampolines

On 2026/2/6 19:22, Björn Töpel wrote:
> On Tue, 3 Feb 2026 at 06:53, Menglong Dong <menglong8.dong@...il.com> wrote:
> 
> > diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
> > index e4f45e2e7e2f..f10418ff6a9b 100644
> > --- a/arch/riscv/net/bpf_jit_comp64.c
> > +++ b/arch/riscv/net/bpf_jit_comp64.c
> 
> > @@ -1042,10 +1067,14 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
> >          *                  [ ...               ]
> >          * FP - args_off    [ arg1              ]
> >          *
> > -        * FP - nregs_off   [ regs count        ]
> > +        * FP - func_meta_off [ regs count, etc ]  always
> 
> Nit: Please remove the "always" comment. It's not helpful.

Ah, sorry that I send out the V2 before I saw this email. Let
me spin a V3.

Thanks!
Menglong Dong

> 
>