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    Subjectuml: use DEFCONFIG_LIST to avoid reading host's config
    Date
    From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>

    This should make sure that, for UML, host's configuration files are not
    considered, which avoids various pains to the user. Our dependency are such that
    the obtained Kconfig will be valid and will lead to successful compilation -
    however they cannot prevent an user from disabling any boot device, and if an
    option is not set in the read .config (say /boot/config-XXX), with make
    menuconfig ARCH=um, it is not set. This always disables UBD and all console I/O
    channels, which leads to non-working UML kernels, so this bothers users -
    especially now, since it will happen on almost every machine
    (/boot/config-`uname -r` exists almost on every machine). It can be workarounded
    with make defconfig ARCH=um, but it is non-obvious and can be avoided, so please
    _do_ merge this patch.

    Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
    Index: linux-2.6.git/arch/um/Kconfig
    ===================================================================
    --- linux-2.6.git.orig/arch/um/Kconfig
    +++ linux-2.6.git/arch/um/Kconfig
    @@ -1,3 +1,8 @@
    +config DEFCONFIG_LIST
    + string
    + option defconfig_list
    + default "arch/$ARCH/defconfig"
    +
    # UML uses the generic IRQ sugsystem
    config GENERIC_HARDIRQS
    bool
    Index: linux-2.6.git/init/Kconfig
    ===================================================================
    --- linux-2.6.git.orig/init/Kconfig
    +++ linux-2.6.git/init/Kconfig
    @@ -1,5 +1,6 @@
    config DEFCONFIG_LIST
    string
    + depends on !UML
    option defconfig_list
    default "/lib/modules/$UNAME_RELEASE/.config"
    default "/etc/kernel-config"
    -
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