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    Subject[PATCH 4/4] random: Make RANDOM_TRUST_CPU depend on ARCH_RANDOM
    Date
    From: Richard Henderson <richard.henderson@linaro.org>

    Listing the set of host architectures does not scale.
    Depend instead on the existence of the architecture rng.

    This will allow RANDOM_TRUST_CPU to be selected on arm64. Today
    ARCH_RANDOM is only selected by x86, s390, and powerpc, so this does not
    adversely affect other architectures.

    Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
    Signed-off-by: Mark Rutland <mark.rutland@arm.com>
    ---
    drivers/char/Kconfig | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
    index 26956c006987..84207d5a9bb0 100644
    --- a/drivers/char/Kconfig
    +++ b/drivers/char/Kconfig
    @@ -539,7 +539,7 @@ endmenu

    config RANDOM_TRUST_CPU
    bool "Trust the CPU manufacturer to initialize Linux's CRNG"
    - depends on X86 || S390 || PPC
    + depends on ARCH_RANDOM
    default n
    help
    Assume that CPU manufacturer (e.g., Intel or AMD for RDSEED or
    --
    2.11.0
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