linux-kernel - Re: [PATCH 01/13] kconfig: split randconfig setup code into set_randconfig

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Date:   Thu, 25 Mar 2021 13:47:33 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/13] kconfig: split randconfig setup code into set_randconfig_seed()

On Sun, Mar 14, 2021 at 4:48 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> This code is too big to be placed in the switch statement.
>
> Move the code into a new helper function. I slightly refactor the code
> without changing the behavior.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---

All applied to linux-kbuild/kconfig.




>  scripts/kconfig/conf.c | 54 ++++++++++++++++++++++++------------------
>  1 file changed, 31 insertions(+), 23 deletions(-)
>
> diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
> index 957d2a0832f7..063c9e7a34c1 100644
> --- a/scripts/kconfig/conf.c
> +++ b/scripts/kconfig/conf.c
> @@ -82,6 +82,36 @@ static void xfgets(char *str, int size, FILE *in)
>                 printf("%s", str);
>  }
>
> +static void set_randconfig_seed(void)
> +{
> +       unsigned int seed;
> +       char *env;
> +       bool seed_set = false;
> +
> +       env = getenv("KCONFIG_SEED");
> +       if (env && *env) {
> +               char *endp;
> +
> +               seed = strtol(env, &endp, 0);
> +               if (*endp == '\0')
> +                       seed_set = true;
> +       }
> +
> +       if (!seed_set) {
> +               struct timeval now;
> +
> +               /*
> +                * Use microseconds derived seed, compensate for systems where it may
> +                * be zero.
> +                */
> +               gettimeofday(&now, NULL);
> +               seed = (now.tv_sec + 1) * (now.tv_usec + 1);
> +       }
> +
> +       printf("KCONFIG_SEED=0x%X\n", seed);
> +       srand(seed);
> +}
> +
>  static int conf_askvalue(struct symbol *sym, const char *def)
>  {
>         if (!sym_has_value(sym))
> @@ -515,30 +545,8 @@ int main(int ac, char **av)
>                         defconfig_file = optarg;
>                         break;
>                 case randconfig:
> -               {
> -                       struct timeval now;
> -                       unsigned int seed;
> -                       char *seed_env;
> -
> -                       /*
> -                        * Use microseconds derived seed,
> -                        * compensate for systems where it may be zero
> -                        */
> -                       gettimeofday(&now, NULL);
> -                       seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 1));
> -
> -                       seed_env = getenv("KCONFIG_SEED");
> -                       if( seed_env && *seed_env ) {
> -                               char *endp;
> -                               int tmp = (int)strtol(seed_env, &endp, 0);
> -                               if (*endp == '\0') {
> -                                       seed = tmp;
> -                               }
> -                       }
> -                       fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
> -                       srand(seed);
> +                       set_randconfig_seed();
>                         break;
> -               }
>                 case oldaskconfig:
>                 case oldconfig:
>                 case allnoconfig:
> --
> 2.27.0
>


-- 
Best Regards
Masahiro Yamada