linux-kernel - Re: [PATCH v2 08/17] libnvdimm: introduce nvdimm_flush() and nvdimm_has

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Date:	Sat, 9 Jul 2016 22:01:24 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	kbuild test robot <lkp@...el.com>
Cc:	kbuild-all@...org,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Linux ACPI <linux-acpi@...r.kernel.org>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	Christoph Hellwig <hch@....de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 08/17] libnvdimm: introduce nvdimm_flush() and nvdimm_has_flush()

On Sat, Jul 9, 2016 at 9:47 PM, kbuild test robot <lkp@...el.com> wrote:
> Hi,
>
> [auto build test ERROR on linux-nvdimm/libnvdimm-for-next]
> [also build test ERROR on next-20160708]
> [cannot apply to v4.7-rc6]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url:    https://github.com/0day-ci/linux/commits/Dan-Williams/replace-pcommit-with-ADR-or-directed-flushing/20160710-113558
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next
> config: i386-randconfig-r0-201628 (attached as .config)
> compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386

Hi kbuild team,

Can we add an "i386 allmodconfig" build to the standard "BUILD
SUCCESS" notification runs?  I had two positive build results on a
private branch prior to posting this series, but the i386 runs did not
build the nvdimm sub-system.

In any event this report is valid, so thank you for that!


>
> All errors (new ones prefixed by >>):
>
>    drivers/nvdimm/region_devs.c: In function 'nvdimm_flush':
>>> drivers/nvdimm/region_devs.c:887:4: error: implicit declaration of function 'writeq' [-Werror=implicit-function-declaration]
>        writeq(1, ndrd->flush_wpq[i][0]);
>        ^~~~~~
>    cc1: some warnings being treated as errors
>
> vim +/writeq +887 drivers/nvdimm/region_devs.c
>
>    881           * writes to avoid the cache via arch_memcpy_to_pmem().  The
>    882           * final wmb() ensures ordering for the NVDIMM flush write.
>    883           */
>    884          wmb();
>    885          for (i = 0; i < nd_region->ndr_mappings; i++)
>    886                  if (ndrd->flush_wpq[i][0])
>  > 887                          writeq(1, ndrd->flush_wpq[i][0]);
>    888          wmb();
>    889  }
>    890  EXPORT_SYMBOL_GPL(nvdimm_flush);
>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation