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

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Message-ID: <201604090123.yO6ZZ440%fengguang.wu@intel.com>
Date:	Sat, 9 Apr 2016 01:45:31 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Waiman Long <Waiman.Long@....com>
Cc:	kbuild-all@...org, Theodore Ts'o <tytso@....edu>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	Scott J Norton <scott.norton@....com>,
	Douglas Hatch <doug.hatch@....com>,
	Toshimitsu Kani <toshi.kani@....com>,
	Waiman Long <Waiman.Long@....com>
Subject: Re: [PATCH v2 1/4] percpu_stats: Simple per-cpu statistics count
 helper functions

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: um-x86_64_defconfig (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=um SUBARCH=x86_64

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 error/warnings (new ones prefixed by >>):

   In file included from arch/um/include/generated/asm/percpu.h:1:0,
                    from include/linux/percpu.h:12,
                    from include/linux/percpu_stats.h:7,
                    from lib/percpu_stats.c:5:
   include/linux/percpu_stats.h: In function 'percpu_stats_add':
>> include/asm-generic/percpu.h:120:2: error: implicit declaration of function 'raw_local_irq_save' [-Werror=implicit-function-declaration]
     raw_local_irq_save(__flags);     \
     ^
>> include/asm-generic/percpu.h:322:34: note: in expansion of macro 'this_cpu_generic_to_op'
    #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
                                     ^
>> include/linux/percpu-defs.h:364:11: note: in expansion of macro 'this_cpu_add_1'
      case 1: stem##1(variable, __VA_ARGS__);break;  \
              ^
   include/linux/percpu-defs.h:496:33: note: in expansion of macro '__pcpu_size_call'
    #define this_cpu_add(pcp, val)  __pcpu_size_call(this_cpu_add_, pcp, val)
                                    ^
>> include/linux/percpu_stats.h:29:2: note: in expansion of macro 'this_cpu_add'
     this_cpu_add(pcs->stats[stat], cnt);
     ^
>> include/asm-generic/percpu.h:122:2: error: implicit declaration of function 'raw_local_irq_restore' [-Werror=implicit-function-declaration]
     raw_local_irq_restore(__flags);     \
     ^
>> include/asm-generic/percpu.h:322:34: note: in expansion of macro 'this_cpu_generic_to_op'
    #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=)
                                     ^
>> include/linux/percpu-defs.h:364:11: note: in expansion of macro 'this_cpu_add_1'
      case 1: stem##1(variable, __VA_ARGS__);break;  \
              ^
   include/linux/percpu-defs.h:496:33: note: in expansion of macro '__pcpu_size_call'
    #define this_cpu_add(pcp, val)  __pcpu_size_call(this_cpu_add_, pcp, val)
                                    ^
>> include/linux/percpu_stats.h:29:2: note: in expansion of macro 'this_cpu_add'
     this_cpu_add(pcs->stats[stat], cnt);
     ^
   cc1: some warnings being treated as errors

vim +/raw_local_irq_save +120 include/asm-generic/percpu.h

eba117889a Tejun Heo 2014-06-17  114  	__ret;								\
9c28278a24 Tejun Heo 2014-06-17  115  })
9c28278a24 Tejun Heo 2014-06-17  116  
eba117889a Tejun Heo 2014-06-17  117  #define this_cpu_generic_to_op(pcp, val, op)				\
9c28278a24 Tejun Heo 2014-06-17  118  do {									\
eba117889a Tejun Heo 2014-06-17  119  	unsigned long __flags;						\
eba117889a Tejun Heo 2014-06-17 @120  	raw_local_irq_save(__flags);					\
9c28278a24 Tejun Heo 2014-06-17  121  	*raw_cpu_ptr(&(pcp)) op val;					\
eba117889a Tejun Heo 2014-06-17 @122  	raw_local_irq_restore(__flags);					\
9c28278a24 Tejun Heo 2014-06-17  123  } while (0)
9c28278a24 Tejun Heo 2014-06-17  124  
eba117889a Tejun Heo 2014-06-17  125  #define this_cpu_generic_add_return(pcp, val)				\

:::::: The code at line 120 was first introduced by commit
:::::: eba117889ac444bea6e8270049cbaeed48169889 percpu: preffity percpu header files

:::::: TO: Tejun Heo <tj@...nel.org>
:::::: CC: Tejun Heo <tj@...nel.org>

---
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