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    Subject[stable:PATCH v4.14.274 02/27] arm64: arch_timer: avoid unused function warning
    Date
    From: Arnd Bergmann <arnd@arndb.de>

    commit 040f340134751d73bd03ee92fabb992946c55b3d upstream.

    arm64_1188873_read_cntvct_el0() is protected by the correct
    CONFIG_ARM64_ERRATUM_1188873 #ifdef, but the only reference to it is
    also inside of an CONFIG_ARM_ARCH_TIMER_OOL_WORKAROUND section,
    and causes a warning if that is disabled:

    drivers/clocksource/arm_arch_timer.c:323:20: error: 'arm64_1188873_read_cntvct_el0' defined but not used [-Werror=unused-function]

    Since the erratum requires that we always apply the workaround
    in the timer driver, select that symbol as we do for SoC
    specific errata.

    Fixes: 95b861a4a6d9 ("arm64: arch_timer: Add workaround for ARM erratum 1188873")
    Acked-by: Marc Zyngier <marc.zyngier@arm.com>
    Signed-off-by: Arnd Bergmann <arnd@arndb.de>
    Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
    Signed-off-by: James Morse <james.morse@arm.com>
    ---
    arch/arm64/Kconfig | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
    index 85310128a65e..7c205e0fd44b 100644
    --- a/arch/arm64/Kconfig
    +++ b/arch/arm64/Kconfig
    @@ -461,6 +461,7 @@ config ARM64_ERRATUM_1024718
    config ARM64_ERRATUM_1188873
    bool "Cortex-A76: MRC read following MRRC read of specific Generic Timer in AArch32 might give incorrect result"
    default y
    + select ARM_ARCH_TIMER_OOL_WORKAROUND
    help
    This option adds work arounds for ARM Cortex-A76 erratum 1188873

    --
    2.30.2
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