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

[Randy Dunlap]

On 4/14/22 06:08, Greg Kroah-Hartman wrote:
> From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> 
> 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@xxxxxxxxxxxxx>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Cc: Arnd Bergmann <arnd@xxxxxxxx>
> Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
> Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> Cc: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>
> Cc: Wei Liu <wei.liu@xxxxxxxxxx>
> Cc: Dexuan Cui <decui@xxxxxxxxxxxxx>
> Cc: linux-hyperv@xxxxxxxxxxxxxxx
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
> Link: https://lore.kernel.org/r/20211126023316.25184-1-rdunlap@xxxxxxxxxxxxx
> Signed-off-by: Wei Liu <wei.liu@xxxxxxxxxx>
> Cc: Petr Štetiar <ynezz@xxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
>  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