[mac80211-next:master 8/13] net/mac80211/rc80211_minstrel_ht.c:829:34: warning: variable 'mg' set but not used

[kernel test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master
head:   735a48481cca453525d9199772f9c3733a47cff4
commit: 80d55154b2f8f5298f14fb83a0fb99cacb043c07 [8/13] mac80211: minstrel_ht: significantly redesign the rate probing strategy
config: alpha-randconfig-r001-20210213 (attached as .config)
compiler: alpha-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://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git/commit/?id=80d55154b2f8f5298f14fb83a0fb99cacb043c07
        git remote add mac80211-next https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
        git fetch --no-tags mac80211-next master
        git checkout 80d55154b2f8f5298f14fb83a0fb99cacb043c07
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

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

All warnings (new ones prefixed by >>):

   net/mac80211/rc80211_minstrel_ht.c: In function 'minstrel_ht_next_inc_rate':
>> net/mac80211/rc80211_minstrel_ht.c:829:34: warning: variable 'mg' set but not used [-Wunused-but-set-variable]
     829 |  struct minstrel_mcs_group_data *mg;
         |                                  ^~
   net/mac80211/rc80211_minstrel_ht.c: In function 'minstrel_ht_next_jump_rate':
   net/mac80211/rc80211_minstrel_ht.c:894:34: warning: variable 'mg' set but not used [-Wunused-but-set-variable]
     894 |  struct minstrel_mcs_group_data *mg;
         |                                  ^~


vim +/mg +829 net/mac80211/rc80211_minstrel_ht.c

   820	
   821	/*
   822	 * Incremental update rates:
   823	 * Flip through groups and pick the first group rate that is faster than the
   824	 * highest currently selected rate
   825	 */
   826	static u16
   827	minstrel_ht_next_inc_rate(struct minstrel_ht_sta *mi, u32 fast_rate_dur)
   828	{
 > 829		struct minstrel_mcs_group_data *mg;
   830		u8 type = MINSTREL_SAMPLE_TYPE_INC;
   831		int i, index = 0;
   832		u8 group;
   833	
   834		group = mi->sample[type].sample_group;
   835		for (i = 0; i < ARRAY_SIZE(minstrel_mcs_groups); i++) {
   836			group = (group + 1) % ARRAY_SIZE(minstrel_mcs_groups);
   837			mg = &mi->groups[group];
   838	
   839			index = minstrel_ht_group_min_rate_offset(mi, group,
   840								  fast_rate_dur);
   841			if (index < 0)
   842				continue;
   843	
   844			index = MI_RATE(group, index & 0xf);
   845			if (!minstrel_ht_find_sample_rate(mi, type, index))
   846				goto out;
   847		}
   848		index = 0;
   849	
   850	out:
   851		mi->sample[type].sample_group = group;
   852	
   853		return index;
   854	}
   855	

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

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