Hi Peng,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on mac80211-next/master]
[also build test ERROR on v4.20-rc7 next-20181220]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Jouni-Malinen/cfg80211-Parsing-of-Multiple-BSSID-information-in-scanning/20181221-123747
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master
config: i386-randconfig-x0-12211724 (attached as .config)
compiler: gcc-5 (Debian 5.5.0-3) 5.4.1 20171010
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   net/wireless/scan.o: In function `cfg80211_gen_new_bssid':
>> net/wireless/scan.c:174: undefined reference to `__umoddi3'

vim +174 net/wireless/scan.c

   162	
   163	static void cfg80211_gen_new_bssid(const u8 *bssid, u8 max_bssid,
   164					   u8 mbssid_index, u8 *new_bssid_addr)
   165	{
   166		u64 bssid_tmp, new_bssid = 0;
   167		u64 lsb_n;
   168	
   169		bssid_tmp = ether_addr_to_u64(bssid);
   170	
   171		lsb_n = bssid_tmp & ((1 << max_bssid) - 1);
   172		new_bssid = bssid_tmp;
   173		new_bssid &= ~((1 << max_bssid) - 1);
 > 174		new_bssid |= (lsb_n + mbssid_index) % (1 << max_bssid);
   175	
   176		u64_to_ether_addr(new_bssid, new_bssid_addr);
   177	}
   178	

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