Re: [PATCH] Fix warning for static const char * array in audio_manager_module.c

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Hi Emmanouil,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on staging/staging-testing]
[also build test ERROR on v5.10-rc4 next-20201116]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Emmanouil-Perselis/Fix-warning-for-static-const-char-array-in-audio_manager_module-c/20201117-044852
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 0d79a48440f559ac939d1be2089757c5e4ab16c7
config: microblaze-randconfig-r011-20201116 (attached as .config)
compiler: microblaze-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
        # https://github.com/0day-ci/linux/commit/69022592162daaee87b29588cd562da4439f0517
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Emmanouil-Perselis/Fix-warning-for-static-const-char-array-in-audio_manager_module-c/20201117-044852
        git checkout 69022592162daaee87b29588cd562da4439f0517
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   drivers/staging/greybus/audio_manager_module.c: In function 'send_add_uevent':
>> drivers/staging/greybus/audio_manager_module.c:162:3: error: initializer element is not constant
     162 |   name_string,
         |   ^~~~~~~~~~~
   drivers/staging/greybus/audio_manager_module.c:162:3: note: (near initialization for 'envp[0]')
   drivers/staging/greybus/audio_manager_module.c:163:3: error: initializer element is not constant
     163 |   vid_string,
         |   ^~~~~~~~~~
   drivers/staging/greybus/audio_manager_module.c:163:3: note: (near initialization for 'envp[1]')
   drivers/staging/greybus/audio_manager_module.c:164:3: error: initializer element is not constant
     164 |   pid_string,
         |   ^~~~~~~~~~
   drivers/staging/greybus/audio_manager_module.c:164:3: note: (near initialization for 'envp[2]')
   drivers/staging/greybus/audio_manager_module.c:165:3: error: initializer element is not constant
     165 |   intf_id_string,
         |   ^~~~~~~~~~~~~~
   drivers/staging/greybus/audio_manager_module.c:165:3: note: (near initialization for 'envp[3]')
   drivers/staging/greybus/audio_manager_module.c:166:3: error: initializer element is not constant
     166 |   ip_devices_string,
         |   ^~~~~~~~~~~~~~~~~
   drivers/staging/greybus/audio_manager_module.c:166:3: note: (near initialization for 'envp[4]')
   drivers/staging/greybus/audio_manager_module.c:167:3: error: initializer element is not constant
     167 |   op_devices_string,
         |   ^~~~~~~~~~~~~~~~~
   drivers/staging/greybus/audio_manager_module.c:167:3: note: (near initialization for 'envp[5]')
>> drivers/staging/greybus/audio_manager_module.c:180:46: error: passing argument 3 of 'kobject_uevent_env' from incompatible pointer type [-Werror=incompatible-pointer-types]
     180 |  kobject_uevent_env(&module->kobj, KOBJ_ADD, envp);
         |                                              ^~~~
         |                                              |
         |                                              const char * const*
   In file included from drivers/staging/greybus/audio_manager.h:11,
                    from drivers/staging/greybus/audio_manager_module.c:10:
   include/linux/kobject.h:241:10: note: expected 'char **' but argument is of type 'const char * const*'
     241 |    char *envp[]);
         |    ~~~~~~^~~~~~
   cc1: some warnings being treated as errors

vim +162 drivers/staging/greybus/audio_manager_module.c

8db00736d365b75 Svetlin Ankov      2016-01-13  151  
8db00736d365b75 Svetlin Ankov      2016-01-13  152  static void send_add_uevent(struct gb_audio_manager_module *module)
8db00736d365b75 Svetlin Ankov      2016-01-13  153  {
8db00736d365b75 Svetlin Ankov      2016-01-13  154  	char name_string[128];
8db00736d365b75 Svetlin Ankov      2016-01-13  155  	char vid_string[64];
8db00736d365b75 Svetlin Ankov      2016-01-13  156  	char pid_string[64];
d0af1bd5f6f4497 Pankaj Bharadiya   2016-10-16  157  	char intf_id_string[64];
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  158  	char ip_devices_string[64];
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  159  	char op_devices_string[64];
8db00736d365b75 Svetlin Ankov      2016-01-13  160  
69022592162daae Emmanouil Perselis 2020-11-16  161  	static const char * const envp[] = {
8db00736d365b75 Svetlin Ankov      2016-01-13 @162  		name_string,
8db00736d365b75 Svetlin Ankov      2016-01-13  163  		vid_string,
8db00736d365b75 Svetlin Ankov      2016-01-13  164  		pid_string,
d0af1bd5f6f4497 Pankaj Bharadiya   2016-10-16 @165  		intf_id_string,
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  166  		ip_devices_string,
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  167  		op_devices_string,
8db00736d365b75 Svetlin Ankov      2016-01-13  168  		NULL
8db00736d365b75 Svetlin Ankov      2016-01-13  169  	};
8db00736d365b75 Svetlin Ankov      2016-01-13  170  
8db00736d365b75 Svetlin Ankov      2016-01-13  171  	snprintf(name_string, 128, "NAME=%s", module->desc.name);
8db00736d365b75 Svetlin Ankov      2016-01-13  172  	snprintf(vid_string, 64, "VID=%d", module->desc.vid);
8db00736d365b75 Svetlin Ankov      2016-01-13  173  	snprintf(pid_string, 64, "PID=%d", module->desc.pid);
d0af1bd5f6f4497 Pankaj Bharadiya   2016-10-16  174  	snprintf(intf_id_string, 64, "INTF_ID=%d", module->desc.intf_id);
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  175  	snprintf(ip_devices_string, 64, "I/P DEVICES=0x%X",
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  176  		 module->desc.ip_devices);
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  177  	snprintf(op_devices_string, 64, "O/P DEVICES=0x%X",
a9234bfd6cec442 Vaibhav Agarwal    2016-03-30  178  		 module->desc.op_devices);
8db00736d365b75 Svetlin Ankov      2016-01-13  179  
8db00736d365b75 Svetlin Ankov      2016-01-13 @180  	kobject_uevent_env(&module->kobj, KOBJ_ADD, envp);
8db00736d365b75 Svetlin Ankov      2016-01-13  181  }
8db00736d365b75 Svetlin Ankov      2016-01-13  182  

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

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