[PATCH v6 4/8] libnvdimm/nvdimm/flush: Allow architecture to override the flush barrier

[kernel test robot]

Hi "Aneesh,

I love your patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on linux-nvdimm/libnvdimm-for-next v5.8-rc3 next-20200629]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Aneesh-Kumar-K-V/Support-new-pmem-flush-and-sync-instructions-for-POWER/20200629-223649
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All errors (new ones prefixed by >>):

   drivers/md/dm-writecache.c: In function 'writecache_commit_flushed':
>> drivers/md/dm-writecache.c:539:3: error: implicit declaration of function 'arch_pmem_flush_barrier' [-Werror=implicit-function-declaration]
     539 |   arch_pmem_flush_barrier();
         |   ^~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/arch_pmem_flush_barrier +539 drivers/md/dm-writecache.c

   535	
   536	static void writecache_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
   537	{
   538		if (WC_MODE_PMEM(wc))
 > 539			arch_pmem_flush_barrier();
   540		else
   541			ssd_commit_flushed(wc, wait_for_ios);
   542	}
   543	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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