Hi Daniel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20200514]
[cannot apply to linus/master v5.7-rc5 v5.7-rc4 v5.7-rc3 v5.7-rc6]
[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/Daniel-Lezcano/thermal-core-Add-helpers-to-browse-the-cdev-tz-and-governor-list/20200515-221257
base:    c9529331c7a22b8eb7eb03e1e0e221d0f58b43de
config: x86_64-rhel-7.6-kselftests (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

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

>> drivers/thermal/thermal_netlink.c:69:5: warning: no previous prototype for 'thermal_genl_sampling_temp' [-Wmissing-prototypes]
int thermal_genl_sampling_temp(int id, int temp)
^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/thermal/thermal_netlink.c:509:5: warning: no previous prototype for 'thermal_genl_cmd_dumpit' [-Wmissing-prototypes]
int thermal_genl_cmd_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/thermal/thermal_netlink.c:535:5: warning: no previous prototype for 'thermal_genl_cmd_doit' [-Wmissing-prototypes]
int thermal_genl_cmd_doit(struct sk_buff *skb, struct genl_info *info)
^~~~~~~~~~~~~~~~~~~~~

vim +/thermal_genl_sampling_temp +69 drivers/thermal/thermal_netlink.c

    68	
  > 69	int thermal_genl_sampling_temp(int id, int temp)
    70	{
    71		struct sk_buff *skb;
    72		void *hdr;
    73	
    74		skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
    75		if (!skb)
    76			return -ENOMEM;
    77	
    78		hdr = genlmsg_put(skb, 0, 0, &thermal_gnl_family, 0,
    79				  THERMAL_GENL_SAMPLING_TEMP);
    80		if (!hdr)
    81			return -EMSGSIZE;
    82	
    83		if (nla_put_u32(skb, THERMAL_GENL_ATTR_TZ_ID, id))
    84			goto out_cancel;
    85	
    86		if (nla_put_u32(skb, THERMAL_GENL_ATTR_TZ_TEMP, temp))
    87			goto out_cancel;
    88	
    89		genlmsg_end(skb, hdr);
    90	
    91		genlmsg_multicast(&thermal_gnl_family, skb, 0, 0, GFP_KERNEL);
    92	
    93		return 0;
    94	out_cancel:
    95		genlmsg_cancel(skb, hdr);
    96		nlmsg_free(skb);
    97	
    98		return -EMSGSIZE;
    99	}
   100	

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