linux-kernel - Re: [RFC PATCH bpf-next 3/4] riscv, bpf: Add bpf_arch_text

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Message-ID: <877cy4xc2l.fsf@all.your.base.are.belong.to.us>
Date:   Tue, 03 Jan 2023 09:21:54 +0100
From:   Björn Töpel <bjorn@...nel.org>
To:     Pu Lehui <pulehui@...wei.com>, Pu Lehui <pulehui@...weicloud.com>,
        bpf@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>
Subject: Re: [RFC PATCH bpf-next 3/4] riscv, bpf: Add bpf_arch_text_poke
 support for RV64

Pu Lehui <pulehui@...wei.com> writes:

> On 2023/1/3 15:37, Björn Töpel wrote:
>> Pu Lehui <pulehui@...weicloud.com> writes:
>> 
>>> diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
>>> index bf4721a99a09..fa8b03c52463 100644
>>> --- a/arch/riscv/net/bpf_jit_comp64.c
>>> +++ b/arch/riscv/net/bpf_jit_comp64.c
>> 
>>> @@ -1266,7 +1389,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
>>>   
>>>   void bpf_jit_build_prologue(struct rv_jit_context *ctx)
>>>   {
>>> -	int stack_adjust = 0, store_offset, bpf_stack_adjust;
>>> +	int i, stack_adjust = 0, store_offset, bpf_stack_adjust;
>>>   	bool is_main_prog = ctx->prog->aux->func_idx == 0;
>> 
>> This line magically appeared, and makes it hard to apply the series
>> without hacking the patches manually. Going forward, please supply a
>> base tree commit to the series (or a link to a complete git tree).
>> 
>
> A rebase version has been resend as follow:
>
> https://lore.kernel.org/bpf/20221220021319.1655871-1-pulehui@huaweicloud.com/

Yes, but with the same issue:
https://lore.kernel.org/bpf/20221220021319.1655871-4-pulehui@huaweicloud.com/

The "is_main_prog" line is still around in the resend.


Björn