Re: [RFC 3/6] LiquidIO VF: add dependency for PTP_1588_CLOCK

[Arnd Bergmann <arnd@arndb.de>]

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On Wed, Apr 8, 2020 at 11:10 PM kbuild test robot <lkp@intel.com> wrote:
>
> Hi Arnd,
>
> [FYI, it's a private test report for your RFC patch.]
> [auto build test ERROR on arm-soc/for-next]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
>
> url:    https://github.com/0day-ci/linux/commits/Arnd-Bergmann/Regressions-for-imply-behavior-change/20200409-044236
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git for-next
> config: i386-tinyconfig
> compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
> reproduce:
>         make ARCH=i386  tinyconfig
>         make ARCH=i386
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kbuild test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
> >> drivers/net/ethernet/freescale/Kconfig:6:error: recursive dependency detected!
> >> drivers/net/ethernet/freescale/Kconfig:6: symbol NET_VENDOR_FREESCALE depends on PPC_BESTCOMM
> >> drivers/dma/bestcomm/Kconfig:6: symbol PPC_BESTCOMM depends on DMADEVICES
> >> drivers/dma/Kconfig:6: symbol DMADEVICES is selected by CRYPTO_DEV_SP_CCP
> >> drivers/crypto/ccp/Kconfig:10: symbol CRYPTO_DEV_SP_CCP depends on CRYPTO
> >> crypto/Kconfig:16: symbol CRYPTO is selected by LIBCRC32C
> >> lib/Kconfig:222: symbol LIBCRC32C is selected by LIQUIDIO
> >> drivers/net/ethernet/cavium/Kconfig:65: symbol LIQUIDIO depends on PTP_1588_CLOCK
> >> drivers/ptp/Kconfig:8: symbol PTP_1588_CLOCK is implied by FEC
> >> drivers/net/ethernet/freescale/Kconfig:23: symbol FEC depends on NET_VENDOR_FREESCALE
>    For a resolution refer to Documentation/kbuild/kconfig-language.rst
>    subsection "Kconfig recursive dependency limitations"

Yes, I expected this regression and sent a separate patch to change
CRYPTO_DEV_SP_CCP
to avoid this:

https://lore.kernel.org/lkml/dade39d2-db11-1830-eda0-d39b40f6c3aa(a)amd.com/