Re: [PATCH v2 1/4] percpu_stats: Simple per-cpu statistics count helper functions

[kbuild test robot]

Hi Waiman,

[auto build test ERROR on ext4/dev]
[also build test ERROR on v4.6-rc2 next-20160408]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Waiman-Long/ext4-Improve-parallel-I-O-performance-on-NVDIMM/20160409-002128
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
config: alpha-defconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=alpha 

Note: the linux-review/Waiman-Long/ext4-Improve-parallel-I-O-performance-on-NVDIMM/20160409-002128 HEAD 712a939b92b9178cb79df4050bba8e6b1d03ca63 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   In file included from lib/percpu_stats.c:5:0:
   include/linux/percpu_stats.h: In function 'percpu_stats_add':
>> include/linux/percpu_stats.h:29:2: error: implicit declaration of function 'raw_local_irq_save' [-Werror=implicit-function-declaration]
     this_cpu_add(pcs->stats[stat], cnt);
     ^
>> include/linux/percpu_stats.h:29:2: error: implicit declaration of function 'raw_local_irq_restore' [-Werror=implicit-function-declaration]
   cc1: some warnings being treated as errors

vim +/raw_local_irq_save +29 include/linux/percpu_stats.h

    23	 * @cnt:  The value to be added to the statistics count
    24	 */
    25	static inline void
    26	percpu_stats_add(struct percpu_stats *pcs, int stat, int cnt)
    27	{
    28		BUG_ON((unsigned int)stat >= pcs->nstats);
  > 29		this_cpu_add(pcs->stats[stat], cnt);
    30	}
    31	
    32	static inline void percpu_stats_inc(struct percpu_stats *pcs, int stat)

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