Re: [PATCH 1/2] libnvdimm: add missing macros

From: kbuild test robot <lkp@intel.com>
To: Eric Engestrom <eric.engestrom@imgtec.com>
Cc: linux-nvdimm@lists.01.org, Eric Engestrom <eric@engestrom.ch>,
	linux-kernel@vger.kernel.org, kbuild-all@01.org
Subject: Re: [PATCH 1/2] libnvdimm: add missing macros
Date: Sat, 9 Jul 2016 01:25:39 +0800	[thread overview]
Message-ID: <201607090117.yBNz7XdD%fengguang.wu@intel.com> (raw)
In-Reply-To: <20160708162911.18756-1-eric.engestrom@imgtec.com>

Hi,

[auto build test WARNING on linux-nvdimm/libnvdimm-for-next]
[also build test WARNING on v4.7-rc6 next-20160708]
[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/Eric-Engestrom/libnvdimm-add-missing-macros/20160709-003310
base:   https://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm.git libnvdimm-for-next
config: x86_64-allmodconfig (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=x86_64 

All warnings (new ones prefixed by >>):

   In file included from drivers/dax/../nvdimm/nd.h:20:0,
                    from drivers/dax/pmem.c:18:
>> include/uapi/linux/ndctl.h:24:0: warning: "ARRAY_SIZE" redefined
    #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])

   In file included from include/linux/percpu-refcount.h:49:0,
                    from drivers/dax/pmem.c:13:
   include/linux/kernel.h:54:0: note: this is the location of the previous definition
    #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))

vim +/ARRAY_SIZE +24 include/uapi/linux/ndctl.h

     8	 * This program is distributed in the hope it will be useful, but WITHOUT ANY
     9	 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    10	 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
    11	 * more details.
    12	 */
    13	#ifndef __NDCTL_H__
    14	#define __NDCTL_H__
    15	
    16	#include <linux/types.h>
    17	
    18	#ifdef __GNUC__
    19	#define __packed __attribute__((packed))
    20	#else
    21	#define __packed
    22	#endif
    23	
  > 24	#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr)[0])
    25	
    26	struct nd_cmd_smart {
    27		__u32 status;
    28		__u8 data[128];
    29	} __packed;
    30	
    31	#define ND_SMART_HEALTH_VALID	(1 << 0)
    32	#define ND_SMART_TEMP_VALID 	(1 << 1)

---
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