linux-kernel - drivers/net/wireless//intel/iwlwifi/mvm/ftm-initiator.c:465:2: note: in expansion of macro 'do

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Message-ID: <201903140236.l6MSlM20%lkp@intel.com>
Date:   Thu, 14 Mar 2019 02:15:40 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Avraham Stern <avraham.stern@...el.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Luca Coelho <luciano.coelho@...el.com>
Subject: drivers/net/wireless//intel/iwlwifi/mvm/ftm-initiator.c:465:2: note:
 in expansion of macro 'do_div'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5453a3df2a5eb49bc24615d4cf0d66b2aae05e5f
commit: 937b10c0de68c56512fb8cd484af3c0b356fc09e iwlwifi: mvm: add debug prints for FTM
date:   4 weeks ago
config: mips-allmodconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 937b10c0de68c56512fb8cd484af3c0b356fc09e
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=mips 

All warnings (new ones prefixed by >>):

   In file included from arch/mips/include/asm/div64.h:12:0,
                    from include/linux/kernel.h:207,
                    from include/linux/skbuff.h:17,
                    from include/linux/if_ether.h:23,
                    from include/linux/etherdevice.h:25,
                    from drivers/net/wireless//intel/iwlwifi/mvm/ftm-initiator.c:62:
   drivers/net/wireless//intel/iwlwifi/mvm/ftm-initiator.c: In function 'iwl_mvm_debug_range_resp':
   include/asm-generic/div64.h:222:28: warning: comparison of distinct pointer types lacks a cast
     (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
                               ^
>> drivers/net/wireless//intel/iwlwifi/mvm/ftm-initiator.c:465:2: note: in expansion of macro 'do_div'
     do_div(rtt_avg, 6666);
     ^~~~~~

vim +/do_div +465 drivers/net/wireless//intel/iwlwifi/mvm/ftm-initiator.c

   459	
   460	static void iwl_mvm_debug_range_resp(struct iwl_mvm *mvm, u8 index,
   461					     struct cfg80211_pmsr_result *res)
   462	{
   463		s64 rtt_avg = res->ftm.rtt_avg * 100;
   464	
 > 465		do_div(rtt_avg, 6666);
   466	
   467		IWL_DEBUG_INFO(mvm, "entry %d\n", index);
   468		IWL_DEBUG_INFO(mvm, "\tstatus: %d\n", res->status);
   469		IWL_DEBUG_INFO(mvm, "\tBSSID: %pM\n", res->addr);
   470		IWL_DEBUG_INFO(mvm, "\thost time: %llu\n", res->host_time);
   471		IWL_DEBUG_INFO(mvm, "\tburst index: %hhu\n", res->ftm.burst_index);
   472		IWL_DEBUG_INFO(mvm, "\tsuccess num: %u\n", res->ftm.num_ftmr_successes);
   473		IWL_DEBUG_INFO(mvm, "\trssi: %d\n", res->ftm.rssi_avg);
   474		IWL_DEBUG_INFO(mvm, "\trssi spread: %hhu\n", res->ftm.rssi_spread);
   475		IWL_DEBUG_INFO(mvm, "\trtt: %lld\n", res->ftm.rtt_avg);
   476		IWL_DEBUG_INFO(mvm, "\trtt var: %llu\n", res->ftm.rtt_variance);
   477		IWL_DEBUG_INFO(mvm, "\trtt spread: %llu\n", res->ftm.rtt_spread);
   478		IWL_DEBUG_INFO(mvm, "\tdistance: %lld\n", rtt_avg);
   479	}
   480	

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