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 <[email protected]>
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/[email protected]