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    Subject[PATCH] kconfig: Make KCONFIG_ALLCONFIG work with randconfig.
    Adrian mentioned a few weeks ago that KCONFIG_ALLCONFIG is the way to
    go to ensure that things like allyes/allmod/allnoconfig work with a
    constrained set of symbols, with the implication that this holds
    true for randconfig as well.

    While allyes/mod/noconfigs do seem to work fine with KCONFIG_ALLCONFIG
    provisions, randconfig tramples all over the provided values at perhaps
    not surprisingly, random.

    Debugging this a bit, there seemed to be two issues:

    - SYMBOL_DEF and SYMBOL_DEF_USER overlap, which made
    def_sym->flags the same regardless of whether we came from an
    KCONFIG_ALLCONFIG path or not.

    - clobbering of the fixed value in conf_choice() by way of
    random() def assignment.

    While I don't pretend to have any idea what I'm doing in Kconfig,
    changing SYMBOL_DEF_USER to reuse the SYMBOL_DEF3 bit (and thereby
    separating it from SYMBOL_DEF) in addition to checking the def_sym flag
    before randomly assigning a new value ended up fixing things up.

    Signed-off-by: Paul Mundt <>


    scripts/kconfig/conf.c | 9 ++++++++-
    scripts/kconfig/expr.h | 3 +--
    2 files changed, 9 insertions(+), 3 deletions(-)

    diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
    index a38787a..61a61df 100644
    --- a/scripts/kconfig/conf.c
    +++ b/scripts/kconfig/conf.c
    @@ -374,7 +374,14 @@ static int conf_choice(struct menu *menu)
    case set_random:
    - def = (random() % cnt) + 1;
    + /*
    + * Defined symbols need to be honoured even in
    + * the randomization case, or else symbols set
    + * via the KCONFIG_ALLCONFIG path are clobbered.
    + * - PFM.
    + */
    + if (!(def_sym->flags & SYMBOL_DEF))
    + def = (random() % cnt) + 1;
    case set_default:
    case set_yes:
    case set_mod:
    diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
    index a195986..f5b4873 100644
    --- a/scripts/kconfig/expr.h
    +++ b/scripts/kconfig/expr.h
    @@ -95,9 +95,8 @@ struct symbol {
    #define SYMBOL_CHECKED 0x2000
    #define SYMBOL_WARNED 0x8000
    #define SYMBOL_DEF 0x10000
    -#define SYMBOL_DEF_USER 0x10000
    #define SYMBOL_DEF_AUTO 0x20000
    -#define SYMBOL_DEF3 0x40000
    +#define SYMBOL_DEF_USER 0x40000
    #define SYMBOL_DEF4 0x80000

    #define SYMBOL_MAXLENGTH 256
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      Last update: 2007-11-28 13:23    [W:0.023 / U:36.516 seconds]
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