linux-kernel - Re: [PATCH 1/6] kconfig: do not call check

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Date:   Fri, 12 Jan 2018 13:26:36 +0100
From:   Ulf Magnusson <ulfalizer@...il.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Marc Herbert <marc.herbert@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/6] kconfig: do not call check_conf() for olddefconfig

On Wed, Jan 10, 2018 at 7:56 AM, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
> check_conf() traverses the menu tree, but it is completely no-op for
> olddefconfig because the following if-else block does nothing.
>
>     if (input_mode == listnewconfig) {
>             ...
>     } else if (input_mode != olddefconfig) {
>             ...
>     }
>
> As the help message says, olddefconfig automatically sets new symbols
> to their default value.  There is no room for manual intervention.
> So, calling check_conf() for olddefconfig is odd in the first place.
> Rather, olddefconfig belongs to the group of alldefconfig and defconfig.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
>
>  scripts/kconfig/conf.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
> index 866369f..52cbe5d 100644
> --- a/scripts/kconfig/conf.c
> +++ b/scripts/kconfig/conf.c
> @@ -434,7 +434,7 @@ static void check_conf(struct menu *menu)
>                                 if (sym->name && !sym_is_choice_value(sym)) {
>                                         printf("%s%s\n", CONFIG_, sym->name);
>                                 }
> -                       } else if (input_mode != olddefconfig) {
> +                       } else {
>                                 if (!conf_cnt++)
>                                         printf(_("*\n* Restart config...\n*\n"));
>                                 rootEntry = menu_get_parent_menu(menu);
> @@ -674,15 +674,15 @@ int main(int ac, char **av)
>                 /* fall through */
>         case oldconfig:
>         case listnewconfig:
> -       case olddefconfig:
>         case silentoldconfig:
>                 /* Update until a loop caused no more changes */
>                 do {
>                         conf_cnt = 0;
>                         check_conf(&rootmenu);
> -               } while (conf_cnt &&
> -                        (input_mode != listnewconfig &&
> -                         input_mode != olddefconfig));
> +               } while (conf_cnt && input_mode != listnewconfig);
> +               break;
> +       case olddefconfig:
> +       default:
>                 break;
>         }
>
> --
> 2.7.4
>

Acked-by: Ulf Magnusson <ulfalizer@...il.com>

Cheers,
Ulf