Re: [PATCH v3 4/6] bus: Add Baikal-T1 AXI-bus driver

[kbuild test robot]

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@xxxxxxxxx>

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

drivers/bus/bt1-axi.c: In function 'inject_error_store':
drivers/bus/bt1-axi.c:228:3: error: implicit declaration of function 'readb' [-Werror=implicit-function-declaration]
228 |   readb(axi->qos_regs);
|   ^~~~~
drivers/bus/bt1-axi.c:230:3: error: implicit declaration of function 'writeb' [-Werror=implicit-function-declaration]
230 |   writeb(0, axi->qos_regs);
|   ^~~~~~
In file included from include/linux/kobject.h:20,
from include/linux/module.h:20,
from drivers/bus/bt1-axi.c:12:
drivers/bus/bt1-axi.c: At top level:
>> drivers/bus/bt1-axi.c:236:23: 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]
236 | 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-axi.c:236:8: note: in expansion of macro 'DEVICE_ATTR_RW'
236 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
drivers/bus/bt1-axi.c:236:23: note: (near initialization for 'dev_attr_inject_error.show')
236 | 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-axi.c:236:8: note: in expansion of macro 'DEVICE_ATTR_RW'
236 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
>> drivers/bus/bt1-axi.c:236:23: 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]
236 | 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-axi.c:236:8: note: in expansion of macro 'DEVICE_ATTR_RW'
236 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
drivers/bus/bt1-axi.c:236:23: note: (near initialization for 'dev_attr_inject_error.store')
236 | 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-axi.c:236:8: note: in expansion of macro 'DEVICE_ATTR_RW'
236 | static DEVICE_ATTR_RW(inject_error);
|        ^~~~~~~~~~~~~~
cc1: some warnings being treated as errors

vim +236 drivers/bus/bt1-axi.c

   215	
   216	static int inject_error_store(struct device *dev,
   217				      struct device_attribute *attr,
   218				      const char *data, size_t count)
   219	{
   220		struct bt1_axi *axi = dev_get_drvdata(dev);
   221	
   222		/*
   223		 * Performing unaligned read from the memory will cause the CM2 bus
   224		 * error while unaligned writing - the AXI bus write error handled
   225		 * by this driver.
   226		 */
   227		if (!strncmp(data, "bus", 3))
   228			readb(axi->qos_regs);
   229		else if (!strncmp(data, "unaligned", 9))
   230			writeb(0, axi->qos_regs);
   231		else
   232			return -EINVAL;
   233	
   234		return count;
   235	}
 > 236	static DEVICE_ATTR_RW(inject_error);
   237	

---
0-DAY CI Kernel Test Service, Intel Corporation
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