linux-kernel - Re: [PATCH 2/2] rv: Make rtapp/pagefault monitor depends on CONFIG

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Message-ID: <067420a47d3fd7d9f50e4bc97248d0b4b812f9cd.camel@redhat.com>
Date: Thu, 02 Oct 2025 13:51:01 +0200
From: Gabriele Monaco <gmonaco@...hat.com>
To: Nam Cao <namcao@...utronix.de>, Steven Rostedt <rostedt@...dmis.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers
	 <mathieu.desnoyers@...icios.com>, linux-trace-kernel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>, 
	stable@...r.kernel.org
Subject: Re: [PATCH 2/2] rv: Make rtapp/pagefault monitor depends on
 CONFIG_MMU

On Thu, 2025-10-02 at 08:23 +0000, Nam Cao wrote:
> There is no page fault without MMU. Compiling the rtapp/pagefault monitor
> without CONFIG_MMU fails as page fault tracepoints' definitions are not
> available.
> 
> Make rtapp/pagefault monitor depends on CONFIG_MMU.

Makes sense.

Reviewed-by: Gabriele Monaco <gmonaco@...hat.com>

Thanks,
Gabriele

> 
> Fixes: 9162620eb604 ("rv: Add rtapp_pagefault monitor")
> Signed-off-by: Nam Cao <namcao@...utronix.de>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes:
> https://lore.kernel.org/oe-kbuild-all/202509260455.6Z9Vkty4-lkp@intel.com/
> Cc: stable@...r.kernel.org
> ---
>  kernel/trace/rv/monitors/pagefault/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/trace/rv/monitors/pagefault/Kconfig
> b/kernel/trace/rv/monitors/pagefault/Kconfig
> index 5e16625f1653..0e013f00c33b 100644
> --- a/kernel/trace/rv/monitors/pagefault/Kconfig
> +++ b/kernel/trace/rv/monitors/pagefault/Kconfig
> @@ -5,6 +5,7 @@ config RV_MON_PAGEFAULT
>  	select RV_LTL_MONITOR
>  	depends on RV_MON_RTAPP
>  	depends on X86 || RISCV
> +	depends on MMU
>  	default y
>  	select LTL_MON_EVENTS_ID
>  	bool "pagefault monitor"