linux-kernel - Re: [PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC

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Message-ID: <CAKxVwgeZhsf3uXhiTLfDU1aszV4i8pfvFTJQd_D_hWLSaQvrdQ@mail.gmail.com>
Date: Fri, 4 Jul 2025 23:42:06 +0800
From: Miao Chen <chenmiao.ku@...il.com>
To: Alexandre Ghiti <alex@...ti.fr>
Cc: Steven Rostedt <rostedt@...dmis.org>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection

Hi Alex,

Ok, I'll start my work right now.

Thanks,

Chen Miao


Alexandre Ghiti <alex@...ti.fr> 于2025年7月4日周五 20:28写道：
>
> Hi Chen Miao,
>
> On 7/4/25 04:06, Miao Chen wrote:
> > Hello Alex,
> >
> > Should I wait for Steven to finish his work before starting mine? He
> > seems to be refactoring a lot of CONFIG logic, which might cause
> > conflicts.
>
>
> I would say no, don't wait for Steven since his work won't land in 6.16,
> we need a fix to prevent build failures for this release.
>
> Thanks,
>
> Alex
>
>
> >
> > Thanks,
> >
> > Chen Miao
> >
> > Alexandre Ghiti <alex@...ti.fr> 于2025年7月4日周五 00:06写道：
> >
> >     Hi Steve,
> >
> >     On 7/3/25 17:40, Steven Rostedt wrote:
> >     > On Thu, 3 Jul 2025 15:00:02 +0200
> >     > Alexandre Ghiti <alex@...ti.fr> wrote:
> >     >
> >     >
> >     >> We could support static ftrace, but I don't think we should, so
> >     I agree
> >     >> with this patch. In fact I had just prepared a patch for this here
> >     >>
> >     https://github.com/linux-riscv/linux/pull/556/commits/0481092a5bec3818658981c11f629e06e66382b3
> >     >> which is a bit more complete since I have removed some dead code.
> >     >>
> >     >> Let's see what other people think about supporting static
> >     ftrace, I have
> >     >> added Steven in cc if he has an opinion.
> >     > Yes, please only support the dynamic ftrace. The static is there
> >     only
> >     > to help archs to get ftrace up and running. Once dynamic is
> >     supported,
> >     > static should not be used.
> >     >
> >     > Hmm, maybe I should just remove the prompt for DYNAMIC_FTRACE.
> >     >
> >     > That is, once it is supported by an architecture, it should be
> >     the only
> >     > thing used.
> >     >
> >     > -- Steve
> >
> >
> >     Thanks for your input.
> >
> >     @ChenMiao: can you come up with a v2 that, in addition, deletes
> >     the dead
> >     code and with a commit log that explains what Steven said? If not
> >     possible for you, let me know and I'll do it.
> >
> >     Thanks,
> >
> >     Alex
> >