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Date:   Thu, 28 May 2020 12:51:00 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Paul Burton <paulburton@...nel.org>,
        Olof Johansson <olof@...om.net>,
        Rob Herring <robh+dt@...nel.org>, linux-mips@...r.kernel.org,
        soc@...nel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/6] bus: Add Baikal-T1 APB-bus driver

Hi Serge,

I love your patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on char-misc/char-misc-testing staging/staging-testing linus/master v5.7-rc7 next-20200526]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Serge-Semin/bus-memory-Add-Baikal-T1-SoC-APB-AXI-L2-drivers/20200526-210837
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: sparc-allyesconfig (attached as .config)
compiler: sparc64-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=sparc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@...el.com>

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/bus/bt1-apb.c: In function 'inject_error_store':
drivers/bus/bt1-apb.c:329:3: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration]
329 |   readl(apb->res);
|   ^~~~~
In file included from include/linux/kobject.h:20,
from include/linux/module.h:20,
from drivers/bus/bt1-apb.c:12:
drivers/bus/bt1-apb.c: At top level:
>> drivers/bus/bt1-apb.c:338:23: error: initialization of 'ssize_t (*)(struct device *, struct device_attribute *, char *)' {aka 'long int (*)(struct device *, struct device_attribute *, char *)'} from incompatible pointer type 'int (*)(struct device *, struct device_attribute *, char *)' [-Werror=incompatible-pointer-types]
338 | static DEVICE_ATTR_RW(inject_error);
|                       ^~~~~~~~~~~~
include/linux/sysfs.h:104:10: note: in definition of macro '__ATTR'
104 |  .show = _show,               |          ^~~~~
include/linux/device.h:130:45: note: in expansion of macro '__ATTR_RW'
130 |  struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
|                                             ^~~~~~~~~
>> drivers/bus/bt1-apb.c:338:8: note: in expansion of macro 'DEVICE_ATTR_RW'
338 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
drivers/bus/bt1-apb.c:338:23: note: (near initialization for 'dev_attr_inject_error.show')
338 | static DEVICE_ATTR_RW(inject_error);
|                       ^~~~~~~~~~~~
include/linux/sysfs.h:104:10: note: in definition of macro '__ATTR'
104 |  .show = _show,               |          ^~~~~
include/linux/device.h:130:45: note: in expansion of macro '__ATTR_RW'
130 |  struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
|                                             ^~~~~~~~~
>> drivers/bus/bt1-apb.c:338:8: note: in expansion of macro 'DEVICE_ATTR_RW'
338 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
>> drivers/bus/bt1-apb.c:338:23: error: initialization of 'ssize_t (*)(struct device *, struct device_attribute *, const char *, size_t)' {aka 'long int (*)(struct device *, struct device_attribute *, const char *, long unsigned int)'} from incompatible pointer type 'int (*)(struct device *, struct device_attribute *, const char *, size_t)' {aka 'int (*)(struct device *, struct device_attribute *, const char *, long unsigned int)'} [-Werror=incompatible-pointer-types]
338 | static DEVICE_ATTR_RW(inject_error);
|                       ^~~~~~~~~~~~
include/linux/sysfs.h:105:11: note: in definition of macro '__ATTR'
105 |  .store = _store,               |           ^~~~~~
include/linux/device.h:130:45: note: in expansion of macro '__ATTR_RW'
130 |  struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
|                                             ^~~~~~~~~
>> drivers/bus/bt1-apb.c:338:8: note: in expansion of macro 'DEVICE_ATTR_RW'
338 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
drivers/bus/bt1-apb.c:338:23: note: (near initialization for 'dev_attr_inject_error.store')
338 | static DEVICE_ATTR_RW(inject_error);
|                       ^~~~~~~~~~~~
include/linux/sysfs.h:105:11: note: in definition of macro '__ATTR'
105 |  .store = _store,               |           ^~~~~~
include/linux/device.h:130:45: note: in expansion of macro '__ATTR_RW'
130 |  struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
|                                             ^~~~~~~~~
>> drivers/bus/bt1-apb.c:338:8: note: in expansion of macro 'DEVICE_ATTR_RW'
338 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +338 drivers/bus/bt1-apb.c

   317	
   318	static int inject_error_store(struct device *dev,
   319				      struct device_attribute *attr,
   320				      const char *data, size_t count)
   321	{
   322		struct bt1_apb *apb = dev_get_drvdata(dev);
   323	
   324		/*
   325		 * Either dummy read from the unmapped address in the APB IO area
   326		 * or manually set the IRQ status.
   327		 */
   328		if (!strncmp(data, "nodev", 5))
   329			readl(apb->res);
   330		else if (!strncmp(data, "irq", 3))
   331			regmap_update_bits(apb->regs, APB_EHB_ISR, APB_EHB_ISR_PENDING,
   332					   APB_EHB_ISR_PENDING);
   333		else
   334			return -EINVAL;
   335	
   336		return count;
   337	}
 > 338	static DEVICE_ATTR_RW(inject_error);
   339	

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

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