Hi, Williams

On Mon, Aug 15, 2016 at 06:30:48PM -0700, Dan Williams wrote:
> On Mon, Aug 15, 2016 at 6:26 PM, Fengguang Wu <fengguang.wu@intel.com> wrote:
> > On Mon, Aug 15, 2016 at 05:58:36PM -0700, Dan Williams wrote:
> >>
> >> On Mon, Aug 15, 2016 at 3:03 AM, kbuild test robot
> >> <fengguang.wu@intel.com> wrote:
> >>>
> >>> tree:
> >>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> >>> head:   694d0d0bb2030d2e36df73e2d23d5770511dbc8d
> >>> commit: ab68f26221366f92611650e8470e6a926801c7d4 /dev/dax, pmem: direct
> >>> access to persistent memory
> >>> date:   3 months ago
> >>> config: i386-randconfig-i1-201633 (attached as .config)
> >>> compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
> >>> reproduce:
> >>>         git checkout ab68f26221366f92611650e8470e6a926801c7d4
> >>>         # save the attached .config to linux build tree
> >>>         make ARCH=i386
> >>>
> >>> All errors (new ones prefixed by >>):
> >>>
> >>>>> make[2]: *** No rule to make target
> >>>>> 'tools/testing/nvdimm//config_check.o', needed by
> >>>>> 'tools/testing/nvdimm//dax.o'.
> >>>
> >>>    make[2]: Target '__build' not remade because of errors.
> >>
> >>
> >> I think this is an invalid build test.  tools/testing/nvdimm/ uses a
> >> external module Kbuild environment, not Kconfig.  So, there's nothing
> >> I can do to prevent this compile error, unless there's some other way
> >> 0-day could determine the configuration dependencies?
> >
> >
> > Yeah if you can offer a concrete rule for the dependency, we'll add
> > it to 0-day.
> 
> Sounds good.  The config_check.c file itself lists the dependencies:
> 
> void check(void)
> {
>         /*
>          * These kconfig symbols must be set to "m" for nfit_test to
>          * load and operate.
>          */
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_LIBNVDIMM));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_BLK_DEV_PMEM));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_BTT));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_PFN));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_ND_BLK));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_ACPI_NFIT));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_DEV_DAX));
>         BUILD_BUG_ON(!IS_MODULE(CONFIG_DEV_DAX_PMEM));
> }

will get the following error info after set all above kconfig to be "m":
/kbuild/src/lkp/Makefile:1478: recipe for target '_module_tools/testing/nvdimm/' failed

Would you please help to take a look? thanks.

reproduce:
	git checkout 29b4817d4018df78086157ea3a55c1d9424a7cfc (v4.8-rc1)
	# save the attached .config to linux build tree
    make HOSTCC=gcc-6 CC=gcc-6 ARCH=x86_64 prepare
    make HOSTCC=gcc-6 CC=gcc-6 ARCH=x86_64 modules_prepare
    make HOSTCC=gcc-6 CC=gcc-6 ARCH=x86_64 M=tools/testing/nvdimm/

error info:
/usr/bin/timeout -k 100 3h /usr/bin/make HOSTCC=gcc-6 CC=gcc-6 -j100 -C source O=/kbuild/obj/lkp/x86_64-rhel-7.2 ARCH=x86_64 M=tools/testing/nvdimm/
make: Entering directory '/kbuild/src/lkp'
make[1]: Entering directory '/kbuild/obj/lkp/x86_64-rhel-7.2'
  LD      tools/testing/nvdimm//built-in.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/core.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/bus.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/dimm.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/region_devs.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/region.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/dimm_devs.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/label.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/namespace_devs.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/btt_devs.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/pfn_devs.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/claim.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/dax_devs.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/pmem.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/blk.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/e820.o
  CC [M]  tools/testing/nvdimm//../../../drivers/acpi/nfit/core.o
  CC [M]  tools/testing/nvdimm//../../../drivers/nvdimm/btt.o
  CC [M]  tools/testing/nvdimm//../../../drivers/acpi/nfit/mce.o
  CC [M]  tools/testing/nvdimm//../../../drivers/dax/dax.o
  CC [M]  tools/testing/nvdimm//../../../drivers/dax/pmem.o
  LD      tools/testing/nvdimm//test/built-in.o
  CC [M]  tools/testing/nvdimm//test/nfit.o
  CC [M]  tools/testing/nvdimm//test/iomap.o
  LD [M]  tools/testing/nvdimm//test/nfit_test_iomap.o
  LD [M]  tools/testing/nvdimm//test/nfit_test.o
/kbuild/src/lkp/Makefile:1478: recipe for target '_module_tools/testing/nvdimm/' failed   <======
make[1]: Leaving directory '/kbuild/obj/lkp/x86_64-rhel-7.2'
Makefile:150: recipe for target 'sub-make' failed
make: Leaving directory '/kbuild/src/lkp'


-- 
Thanks
Ren Yilong