linux-kernel - Re: [PATCH v3 2/6] trace: add CONFIG_BUILTIN_MODULE

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Date: Mon, 20 May 2024 18:38:13 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Kris Van Hees <kris.van.hees@...cle.com>
Cc: linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org, 
	linux-modules@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	Nick Alcock <nick.alcock@...cle.com>, Alan Maguire <alan.maguire@...cle.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Luis Chamberlain <mcgrof@...nel.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, 
	Jiri Olsa <olsajiri@...il.com>, Elena Zannoni <elena.zannoni@...cle.com>
Subject: Re: [PATCH v3 2/6] trace: add CONFIG_BUILTIN_MODULE_RANGES option

On Fri, May 17, 2024 at 1:30 PM Kris Van Hees <kris.van.hees@...clecom> wrote:
>
> The CONFIG_BUILTIN_MODULE_RANGES option controls whether offset range data
> is generated for kernel modules that are built into the kernel image.
>
> Signed-off-by: Kris Van Hees <kris.van.hees@...cle.com>
> Reviewed-by: Nick Alcock <nick.alcock@...cle.com>
> Reviewed-by: Alan Maguire <alan.maguire@...cle.com>
> ---
> Changes since v2:
>  - Add explicit dependency on FTRACE for CONFIG_BUILTIN_MODULE_RANGES
> ---
>  kernel/trace/Kconfig | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>
> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index 47345bf1d4a9f..d0c82b4b3a61e 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -188,6 +188,24 @@ menuconfig FTRACE
>
>  if FTRACE
>
> +config BUILTIN_MODULE_RANGES
> +       bool "Generate address range information for builtin modules"
> +       depends on FTRACE
> +       select VMLINUX_MAP



I still got this warning.


WARNING: unmet direct dependencies detected for VMLINUX_MAP
  Depends on [n]: EXPERT [=n]
  Selected by [y]:
  - BUILTIN_MODULE_RANGES [=y] && FTRACE [=y]





I recommend changing 'select VMLINUX_MAP'
to 'depends on VMLINUX_MAP'.



BTW, do you need to put this inside 'if FTRACE'?

FTRACE is not required to generate the ranges file.




-- 
Best Regards
Masahiro Yamada