Re: [PATCH 4.19 003/338] hv: utils: add PTP_1588_CLOCK to Kconfig to fix build

Randy Dunlap
2022-04-14T16:32:36Z

On 4/14/22 06:08, Greg Kroah-Hartman wrote:
> 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
> @@ -16,6 +16,7 @@ config HYPERV_TSCPAGE
> 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.

Please drop this one also. PTP_1588_CLOCK_OPTIONAL is not present
in 4.x kernels.

Sorry for the problem.

--
~Randy