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: x86_64-randconfig-a006-20201115 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ace9653c11c6308401dcda2e8b26bf97e6e66e30)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # 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=clang make.cross ARCH=x86_64 

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:162:3: error: initializer element is not a compile-time constant
                   name_string,
                   ^~~~~~~~~~~
>> drivers/staging/greybus/audio_manager_module.c:180:46: error: passing 'const char *const [7]' to parameter of type 'char **' discards qualifiers in nested pointer types [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           kobject_uevent_env(&module->kobj, KOBJ_ADD, envp);
                                                       ^~~~
   include/linux/kobject.h:241:10: note: passing argument to parameter 'envp' here
                           char *envp[]);
                                 ^
   2 errors generated.

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

8db00736d365b7 Svetlin Ankov      2016-01-13  151  
8db00736d365b7 Svetlin Ankov      2016-01-13  152  static void send_add_uevent(struct gb_audio_manager_module *module)
8db00736d365b7 Svetlin Ankov      2016-01-13  153  {
8db00736d365b7 Svetlin Ankov      2016-01-13  154  	char name_string[128];
8db00736d365b7 Svetlin Ankov      2016-01-13  155  	char vid_string[64];
8db00736d365b7 Svetlin Ankov      2016-01-13  156  	char pid_string[64];
d0af1bd5f6f449 Pankaj Bharadiya   2016-10-16  157  	char intf_id_string[64];
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  158  	char ip_devices_string[64];
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  159  	char op_devices_string[64];
8db00736d365b7 Svetlin Ankov      2016-01-13  160  
69022592162daa Emmanouil Perselis 2020-11-16  161  	static const char * const envp[] = {
8db00736d365b7 Svetlin Ankov      2016-01-13 @162  		name_string,
8db00736d365b7 Svetlin Ankov      2016-01-13  163  		vid_string,
8db00736d365b7 Svetlin Ankov      2016-01-13  164  		pid_string,
d0af1bd5f6f449 Pankaj Bharadiya   2016-10-16  165  		intf_id_string,
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  166  		ip_devices_string,
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  167  		op_devices_string,
8db00736d365b7 Svetlin Ankov      2016-01-13  168  		NULL
8db00736d365b7 Svetlin Ankov      2016-01-13  169  	};
8db00736d365b7 Svetlin Ankov      2016-01-13  170  
8db00736d365b7 Svetlin Ankov      2016-01-13  171  	snprintf(name_string, 128, "NAME=%s", module->desc.name);
8db00736d365b7 Svetlin Ankov      2016-01-13  172  	snprintf(vid_string, 64, "VID=%d", module->desc.vid);
8db00736d365b7 Svetlin Ankov      2016-01-13  173  	snprintf(pid_string, 64, "PID=%d", module->desc.pid);
d0af1bd5f6f449 Pankaj Bharadiya   2016-10-16  174  	snprintf(intf_id_string, 64, "INTF_ID=%d", module->desc.intf_id);
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  175  	snprintf(ip_devices_string, 64, "I/P DEVICES=0x%X",
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  176  		 module->desc.ip_devices);
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  177  	snprintf(op_devices_string, 64, "O/P DEVICES=0x%X",
a9234bfd6cec44 Vaibhav Agarwal    2016-03-30  178  		 module->desc.op_devices);
8db00736d365b7 Svetlin Ankov      2016-01-13  179  
8db00736d365b7 Svetlin Ankov      2016-01-13 @180  	kobject_uevent_env(&module->kobj, KOBJ_ADD, envp);
8db00736d365b7 Svetlin Ankov      2016-01-13  181  }
8db00736d365b7 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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