Hi,

[auto build test ERROR on pm/linux-next]
[also build test ERROR on v4.7-rc3]
[cannot apply to next-20160614]
[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/Octavian-Purdila/ACPI-overlays/20160614-202312
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-allyesconfig (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 

Note: the linux-review/Octavian-Purdila/ACPI-overlays/20160614-202312 HEAD 042f716a165ffa274684c787377acddfc1f34e3f builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/acpi/configfs.c: In function 'acpi_configfs_init':
>> drivers/acpi/configfs.c:19:31: error: 'acpi_configfs' undeclared (first use in this function)
     struct config_group *root = &acpi_configfs.su_group;
                                  ^~~~~~~~~~~~~
   drivers/acpi/configfs.c:19:31: note: each undeclared identifier is reported only once for each function it appears in
   drivers/acpi/configfs.c: In function 'acpi_configfs_exit':
   drivers/acpi/configfs.c:33:33: error: 'acpi_configfs' undeclared (first use in this function)
     configfs_unregister_subsystem(&acpi_configfs);
                                    ^~~~~~~~~~~~~

vim +/acpi_configfs +19 drivers/acpi/configfs.c

    13	#include <linux/configfs.h>
    14	#include <linux/acpi.h>
    15	
    16	static int __init acpi_configfs_init(void)
    17	{
    18		int ret;
  > 19		struct config_group *root = &acpi_configfs.su_group;
    20	
    21		config_group_init(root);
    22	

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