linux-kernel - Re: [PATCH v16 01/18] tracing: Use arch_ftrace_regs() for ftrace_regs

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Message-ID: <20241015172757.3221a96f@gandalf.local.home>
Date: Tue, 15 Oct 2024 17:27:57 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@...il.com>, Florent Revest
 <revest@...omium.org>, linux-trace-kernel@...r.kernel.org, LKML
 <linux-kernel@...r.kernel.org>, Martin KaFai Lau <martin.lau@...ux.dev>,
 bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>, Jiri Olsa
 <jolsa@...nel.org>, Alan Maguire <alan.maguire@...cle.com>, Mark Rutland
 <mark.rutland@....com>, linux-arch@...r.kernel.org
Subject: Re: [PATCH v16 01/18] tracing: Use arch_ftrace_regs() for
 ftrace_regs_*() macros


FYI, for anything to do with function hooks (fentry), the subject should be
"ftrace:" not "tracing:".

Tracing has to do with the tracing infrastructure, whereas ftrace is the
function hook infrastructure.

I just accepted the first two patches of this series and made the changes
to the subjects.

If a change is for function graph infrastructure specifically, you can use
"fgraph:" instead.

-- Steve


On Tue, 15 Oct 2024 10:28:43 +0900
"Masami Hiramatsu (Google)" <mhiramat@...nel.org> wrote:

> From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> 
> Since the arch_ftrace_get_regs(fregs) is only valid when the
> FL_SAVE_REGS is set, we need to use `&arch_ftrace_regs()->regs` for
> ftrace_regs_*() APIs because those APIs are for ftrace_regs, not
> complete pt_regs.
>