Hi "Toke, I love your patch! Perhaps something to improve: [auto build test WARNING on mac80211-next/master] [also build test WARNING on next-20210505] [cannot apply to mac80211/master v5.12] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Toke-H-iland-J-rgensen/mac80211-Switch-to-a-virtual-time-based-airtime-scheduler/20210505-224557 base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master config: i386-randconfig-s002-20210505 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/4ff38b3940e58b3d8e44594f44f2f700e5b930b5 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Toke-H-iland-J-rgensen/mac80211-Switch-to-a-virtual-time-based-airtime-scheduler/20210505-224557 git checkout 4ff38b3940e58b3d8e44594f44f2f700e5b930b5 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> net/mac80211/tx.c:4020:6: sparse: sparse: context imbalance in 'ieee80211_txq_may_transmit' - wrong count at exit vim +/ieee80211_txq_may_transmit +4020 net/mac80211/tx.c 3ace10f5b5ad94 Kan Yan 2019-11-18 4019 b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 @4020 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw, b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4021 struct ieee80211_txq *txq) b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4022 { 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4023 struct txq_info *first_txqi = NULL, *txqi = to_txq_info(txq); b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4024 struct ieee80211_local *local = hw_to_local(hw); 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4025 struct airtime_sched_info *air_sched; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4026 struct airtime_info *air_info; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4027 struct rb_node *node = NULL; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4028 bool ret = false; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4029 u64 now; b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4030 b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4031 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4032 if (!ieee80211_txq_airtime_check(hw, txq)) 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4033 return false; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4034 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4035 air_sched = &local->airtime[txq->ac]; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4036 spin_lock_bh(&air_sched->lock); b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4037 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4038 if (RB_EMPTY_NODE(&txqi->schedule_order)) b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4039 goto out; b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4040 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4041 now = ktime_get_boottime_ns(); b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4042 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4043 /* Like in ieee80211_next_txq(), make sure the first station in the 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4044 * scheduling order is eligible for transmission to avoid starvation. 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4045 */ 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4046 node = rb_first_cached(&air_sched->active_txqs); 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4047 if (node) { 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4048 first_txqi = container_of(node, struct txq_info, 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4049 schedule_order); 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4050 air_info = to_airtime_info(&first_txqi->txq); b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4051 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4052 if (air_sched->v_t < air_info->v_t) 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4053 airtime_catchup_v_t(air_sched, air_info->v_t, now); 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4054 } b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4055 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4056 air_info = to_airtime_info(&txqi->txq); 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4057 if (air_info->v_t <= air_sched->v_t) { 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4058 air_sched->last_schedule_activity = now; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4059 ret = true; 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4060 } b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4061 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4062 spin_unlock_bh(&air_sched->lock); b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4063 out: 4ff38b3940e58b Toke Høiland-Jørgensen 2021-05-05 4064 return ret; b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4065 } b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4066 EXPORT_SYMBOL(ieee80211_txq_may_transmit); b4809e9484da14 Toke Høiland-Jørgensen 2018-12-18 4067 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
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