Hi, [auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Cong-Wang/net_sched-refactor-tc-action-structures/20160722-010949 config: sh-titan_defconfig (attached as .config) compiler: sh4-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=sh Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from include/net/act_api.h:8:0, from net/sched/act_police.c:22: net/sched/act_police.c: In function 'tcf_act_police_init': >> include/net/sch_generic.h:782:16: warning: 'police' may be used >> uninitialized in this function [-Wmaybe-uninitialized] if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) ^ net/sched/act_police.c:125:21: note: 'police' was declared here struct tcf_police *police; ^ vim +/police +782 include/net/sch_generic.h e9bef55d3 Jesper Dangaard Brouer 2007-09-12 766 return rtab->data[slot]; e9bef55d3 Jesper Dangaard Brouer 2007-09-12 767 } e9bef55d3 Jesper Dangaard Brouer 2007-09-12 768 292f1c7ff Jiri Pirko 2013-02-12 769 struct psched_ratecfg { 130d3d68b Eric Dumazet 2013-06-06 770 u64 rate_bytes_ps; /* bytes per second */ 292f1c7ff Jiri Pirko 2013-02-12 771 u32 mult; 01cb71d2d Eric Dumazet 2013-06-02 772 u16 overhead; 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 773 u8 linklayer; 01cb71d2d Eric Dumazet 2013-06-02 774 u8 shift; 292f1c7ff Jiri Pirko 2013-02-12 775 }; 292f1c7ff Jiri Pirko 2013-02-12 776 292f1c7ff Jiri Pirko 2013-02-12 777 static inline u64 psched_l2t_ns(const struct psched_ratecfg *r, 292f1c7ff Jiri Pirko 2013-02-12 778 unsigned int len) 292f1c7ff Jiri Pirko 2013-02-12 779 { 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 780 len += r->overhead; 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 781 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 @782 if (unlikely(r->linklayer == TC_LINKLAYER_ATM)) 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 783 return ((u64)(DIV_ROUND_UP(len,48)*53) * r->mult) >> r->shift; 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 784 8a8e3d84b Jesper Dangaard Brouer 2013-08-14 785 return ((u64)len * r->mult) >> r->shift; 292f1c7ff Jiri Pirko 2013-02-12 786 } 292f1c7ff Jiri Pirko 2013-02-12 787 5c15257f9 Joe Perches 2013-07-30 788 void psched_ratecfg_precompute(struct psched_ratecfg *r, 3e1e3aae1 Eric Dumazet 2013-09-19 789 const struct tc_ratespec *conf, 3e1e3aae1 Eric Dumazet 2013-09-19 790 u64 rate64); :::::: The code at line 782 was first introduced by commit :::::: 8a8e3d84b1719a56f9151909e80ea6ebc5b8e318 net_sched: restore "linklayer atm" handling :::::: TO: Jesper Dangaard Brouer <bro...@redhat.com> :::::: CC: David S. Miller <da...@davemloft.net> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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