linux-kernel - Re: [PATCH 1/3] init: bootconfig: Remove all bootconfig data when the init memory is removed

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Message-Id: <20210826232751.614f9be6c5ea0a48c5cebd04@kernel.org>
Date:   Thu, 26 Aug 2021 23:27:51 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] init: bootconfig: Remove all bootconfig data when
 the init memory is removed

On Thu, 26 Aug 2021 18:12:07 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> Since the bootconfig is used only in the init functions,
> it doesn't need to keep the data after boot. Free it when
> the init memory is removed.
> 
> Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> ---
>  init/main.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/init/main.c b/init/main.c
> index 8d97aba78c3a..d9b0a99bb2dd 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -1493,6 +1493,7 @@ static int __ref kernel_init(void *unused)
>  	kprobe_free_init_mem();
>  	ftrace_free_init_mem();
>  	kgdb_free_init_mem();
> +	xbc_destroy_all();

Oops, xbc_destroy_all() is not defined if CONFIG_BOOT_CONFIG=n.
Let me fix that.

Thanks,

>  	free_initmem();
>  	mark_readonly();
>  
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>