From: "Yann E. MORIN" <yann.morin.1998@xxxxxxx> Introduce a KCONFIG_PROBABILITY environment variable to tweak the probability between 0 (all options off) and 100 (all options on). [Patch originally written by Peter for Buildroot, see: ] [http://git.buildroot.org/buildroot/commit/?id=3435c1afb5 ] Signed-off-by: Peter Korsgaard <jacmet@xxxxxxxxxx> [yann.morin.1998@xxxxxxx: add to Documentation/] Signed-off-by: "Yann E. MORIN" <yann.morin.1998@xxxxxxx> --- Documentation/kbuild/kconfig.txt | 17 +++++++++++++++++ scripts/kconfig/confdata.c | 22 +++++++++++++++++++--- 2 files changed, 36 insertions(+), 3 deletions(-) diff --git a/Documentation/kbuild/kconfig.txt b/Documentation/kbuild/kconfig.txt index dbf746b..1817128 100644 --- a/Documentation/kbuild/kconfig.txt +++ b/Documentation/kbuild/kconfig.txt @@ -98,6 +98,23 @@ You can set this to the integer value used to seed the RNG, if you want to somehow debug the behaviour of the kconfig parser/frontends. If not set, the current time will be used. +KCONFIG_PROBABILITY +-------------------------------------------------- +If this variable is set and contains an integer in the range [0,100], +then its value is used as a probability each variable is set. If the +variable is a tristate, there is then a further 50% chance it is set +to either 'M' or 'Y'. If KCONFIG_PROBABILITY is not set, then the +default is 50. Examples (rounded figures): + KCONFIG_PROBABILITY=33 + boolean : no : 67% yes: 33% + tristrate : no : 67% mod: 16% yes: 16% + KCONFIG_PROBABILITY=50 + boolean : no : 50% yes: 50% + tristate : no : 50% mod: 25% yes: 25% + KCONFIG_PROBABILITY=67 + boolean : no : 33% yes: 67% + tristrate : no : 33% mod: 33% yes: 33% + ______________________________________________________________________ Environment variables for 'silentoldconfig' diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c index 13ddf11..8d8d853 100644 --- a/scripts/kconfig/confdata.c +++ b/scripts/kconfig/confdata.c @@ -1106,7 +1106,16 @@ static void set_all_choice_values(struct symbol *csym) void conf_set_all_new_symbols(enum conf_def_mode mode) { struct symbol *sym, *csym; - int i, cnt; + int i, cnt, prob = 50; + + if (mode == def_random) { + char *endp, *env = getenv("KCONFIG_PROBABILITY"); + if (env && *env) { + int tmp = (int)strtol(env, &endp, 10); + if (*endp == '\0' && tmp >= 0 && tmp <= 100) + prob = tmp; + } + } for_all_symbols(i, sym) { if (sym_has_value(sym)) @@ -1125,8 +1134,15 @@ void conf_set_all_new_symbols(enum conf_def_mode mode) sym->def[S_DEF_USER].tri = no; break; case def_random: - cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2; - sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt); + cnt = (rand() % 100) - (100 - prob); + if (cnt < 0) + sym->def[S_DEF_USER].tri = no; + else + if ((sym_get_type(sym) == S_TRISTATE) + && (cnt > prob/2)) + sym->def[S_DEF_USER].tri = mod; + else + sym->def[S_DEF_USER].tri = yes; break; default: continue; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
