Re: [PATCH v2 1/6] panic: Separate sysctl logic from CONFIG_SMP

[Bill Wendling]

On Wed, Nov 9, 2022 at 12:01 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote:
>
> In preparation for adding more sysctls directly in kernel/panic.c, split
> CONFIG_SMP from the logic that adds sysctls.
>
> Cc: Petr Mladek <pmladek@xxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: tangmeng <tangmeng@xxxxxxxxxxxxx>
> Cc: "Guilherme G. Piccoli" <gpiccoli@xxxxxxxxxx>
> Cc: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
> ---
>  kernel/panic.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/kernel/panic.c b/kernel/panic.c
> index da323209f583..129936511380 100644
> --- a/kernel/panic.c
> +++ b/kernel/panic.c
> @@ -75,8 +75,9 @@ ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
>
>  EXPORT_SYMBOL(panic_notifier_list);
>
> -#if defined(CONFIG_SMP) && defined(CONFIG_SYSCTL)
> +#if CONFIG_SYSCTL

Should this be "#ifdef CONFIG_SYSCTL"?

>  static struct ctl_table kern_panic_table[] = {
> +#if defined(CONFIG_SMP)

nit: This could be "#ifdef CONFIG_SMP"

>         {
>                 .procname       = "oops_all_cpu_backtrace",
>                 .data           = &sysctl_oops_all_cpu_backtrace,
> @@ -86,6 +87,7 @@ static struct ctl_table kern_panic_table[] = {
>                 .extra1         = SYSCTL_ZERO,
>                 .extra2         = SYSCTL_ONE,
>         },
> +#endif
>         { }
>  };
>
> --
> 2.34.1
>