linux-kernel - Re: [PATCH] ARM: ftrace: Implement HAVE_FUNCTION_GRAPH

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Message-ID: <CACRpkdYYTe0YArbheo3msd6r+CNrt9oSZWNjkiwb=ZNWfJ1dkQ@mail.gmail.com>
Date: Wed, 20 Aug 2025 09:20:48 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Richard Weinberger <richard@....at>
Cc: linux@...linux.org.uk, rostedt@...dmis.org, mhiramat@...nel.org, 
	mark.rutland@....com, ardb@...nel.org, ebiggers@...nel.org, nathan@...nel.org, 
	dave@...ilevsky.ca, ruanjinjie@...wei.com, liuyuntao12@...wei.com, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-trace-kernel@...r.kernel.org, Donglin Peng <pengdonglin@...gfor.com.cn>
Subject: Re: [PATCH] ARM: ftrace: Implement HAVE_FUNCTION_GRAPH_FREGS

On Mon, Aug 18, 2025 at 12:40 PM Richard Weinberger <richard@....at> wrote:

> Enable support for ftrace's funcgraph-retval feature by capturing r0-r3
> and fp.
> Since ARM does not provide its own __arch_ftrace_regs structure,
> we instead populate pt_regs with the registers required by ftrace.
>
> Cc: Donglin Peng <pengdonglin@...gfor.com.cn>
> Signed-off-by: Richard Weinberger <richard@....at>

LGTM
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Can you put this patch into Russell's patch tracker?
https://www.armlinux.org.uk/developer/patches/

Yours,
Linus Walleij