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    Subject[PATCH 5.10 004/599] hv: utils: add PTP_1588_CLOCK to Kconfig to fix build
    Date
    From: Randy Dunlap <rdunlap@infradead.org>

    commit 1dc2f2b81a6a9895da59f3915760f6c0c3074492 upstream.

    The hyperv utilities use PTP clock interfaces and should depend a
    a kconfig symbol such that they will be built as a loadable module or
    builtin so that linker errors do not happen.

    Prevents these build errors:

    ld: drivers/hv/hv_util.o: in function `hv_timesync_deinit':
    hv_util.c:(.text+0x37d): undefined reference to `ptp_clock_unregister'
    ld: drivers/hv/hv_util.o: in function `hv_timesync_init':
    hv_util.c:(.text+0x738): undefined reference to `ptp_clock_register'

    Fixes: 3716a49a81ba ("hv_utils: implement Hyper-V PTP source")
    Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
    Reported-by: kernel test robot <lkp@intel.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: "K. Y. Srinivasan" <kys@microsoft.com>
    Cc: Haiyang Zhang <haiyangz@microsoft.com>
    Cc: Stephen Hemminger <sthemmin@microsoft.com>
    Cc: Wei Liu <wei.liu@kernel.org>
    Cc: Dexuan Cui <decui@microsoft.com>
    Cc: linux-hyperv@vger.kernel.org
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Reviewed-by: Michael Kelley <mikelley@microsoft.com>
    Link: https://lore.kernel.org/r/20211126023316.25184-1-rdunlap@infradead.org
    Signed-off-by: Wei Liu <wei.liu@kernel.org>
    Cc: Petr Štetiar <ynezz@true.cz>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/hv/Kconfig | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/hv/Kconfig
    +++ b/drivers/hv/Kconfig
    @@ -17,6 +17,7 @@ config HYPERV_TIMER
    config HYPERV_UTILS
    tristate "Microsoft Hyper-V Utilities driver"
    depends on HYPERV && CONNECTOR && NLS
    + depends on PTP_1588_CLOCK_OPTIONAL
    help
    Select this option to enable the Hyper-V Utilities.


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