tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: a8c621aa031669a6835da1431d9765e3bbbc3621 commit: b8fcf506e7428600d59004a436f0ce98a21874d7 [3106/3106] bfq: Get rid of __bio_blkcg() usage config: arm64-randconfig-003-20250806 (https://download.01.org/0day-ci/archive/20250806/202508062043.ijR1VTdp-lkp@i...) compiler: aarch64-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250806/202508062043.ijR1VTdp-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202508062043.ijR1VTdp-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

block/bfq-cgroup.c:692: warning: Function parameter or member 'bfqg' not described in '__bfq_bic_change_cgroup' block/bfq-cgroup.c:692: warning: Excess function parameter 'blkcg' description in '__bfq_bic_change_cgroup' block/bfq-cgroup.c:841: warning: Function parameter or member 'ioprio_class' not described in 'bfq_reparent_leaf_entity' block/bfq-cgroup.c:871: warning: Function parameter or member 'ioprio_class' not described in 'bfq_reparent_active_queues'

vim +692 block/bfq-cgroup.c ea25da48086d3b Paolo Valente 2017-04-19 678 ea25da48086d3b Paolo Valente 2017-04-19 679 /** ea25da48086d3b Paolo Valente 2017-04-19 680 * __bfq_bic_change_cgroup - move @bic to @cgroup. ea25da48086d3b Paolo Valente 2017-04-19 681 * @bfqd: the queue descriptor. ea25da48086d3b Paolo Valente 2017-04-19 682 * @bic: the bic to move. ea25da48086d3b Paolo Valente 2017-04-19 683 * @blkcg: the blk-cgroup to move to. ea25da48086d3b Paolo Valente 2017-04-19 684 * 8f9bebc33dd718 Paolo Valente 2017-06-05 685 * Move bic to blkcg, assuming that bfqd->lock is held; which makes 8f9bebc33dd718 Paolo Valente 2017-06-05 686 * sure that the reference to cgroup is valid across the call (see 8f9bebc33dd718 Paolo Valente 2017-06-05 687 * comments in bfq_bic_update_cgroup on this issue) ea25da48086d3b Paolo Valente 2017-04-19 688 */ b8fcf506e74286 Jan Kara 2022-11-21 689 static void *__bfq_bic_change_cgroup(struct bfq_data *bfqd, ea25da48086d3b Paolo Valente 2017-04-19 690 struct bfq_io_cq *bic, b8fcf506e74286 Jan Kara 2022-11-21 691 struct bfq_group *bfqg) ea25da48086d3b Paolo Valente 2017-04-19 @692 { ea25da48086d3b Paolo Valente 2017-04-19 693 struct bfq_queue *async_bfqq = bic_to_bfqq(bic, 0); ea25da48086d3b Paolo Valente 2017-04-19 694 struct bfq_queue *sync_bfqq = bic_to_bfqq(bic, 1); ea25da48086d3b Paolo Valente 2017-04-19 695 struct bfq_entity *entity; ea25da48086d3b Paolo Valente 2017-04-19 696 ea25da48086d3b Paolo Valente 2017-04-19 697 if (async_bfqq) { ea25da48086d3b Paolo Valente 2017-04-19 698 entity = &async_bfqq->entity; ea25da48086d3b Paolo Valente 2017-04-19 699 ea25da48086d3b Paolo Valente 2017-04-19 700 if (entity->sched_data != &bfqg->sched_data) { ea25da48086d3b Paolo Valente 2017-04-19 701 bic_set_bfqq(bic, NULL, 0); c8997736650060 Paolo Valente 2020-03-21 702 bfq_release_process_ref(bfqd, async_bfqq); ea25da48086d3b Paolo Valente 2017-04-19 703 } ea25da48086d3b Paolo Valente 2017-04-19 704 } ea25da48086d3b Paolo Valente 2017-04-19 705 ea25da48086d3b Paolo Valente 2017-04-19 706 if (sync_bfqq) { 0154382317ee69 Jan Kara 2022-09-29 707 if (!sync_bfqq->new_bfqq && !bfq_bfqq_coop(sync_bfqq)) { 0154382317ee69 Jan Kara 2022-09-29 708 /* We are the only user of this bfqq, just move it */ 0154382317ee69 Jan Kara 2022-09-29 709 if (sync_bfqq->entity.sched_data != &bfqg->sched_data) ea25da48086d3b Paolo Valente 2017-04-19 710 bfq_bfqq_move(bfqd, sync_bfqq, bfqg); 0154382317ee69 Jan Kara 2022-09-29 711 } else { 0154382317ee69 Jan Kara 2022-09-29 712 struct bfq_queue *bfqq; 0154382317ee69 Jan Kara 2022-09-29 713 0154382317ee69 Jan Kara 2022-09-29 714 /* 0154382317ee69 Jan Kara 2022-09-29 715 * The queue was merged to a different queue. Check 0154382317ee69 Jan Kara 2022-09-29 716 * that the merge chain still belongs to the same 0154382317ee69 Jan Kara 2022-09-29 717 * cgroup. 0154382317ee69 Jan Kara 2022-09-29 718 */ 0154382317ee69 Jan Kara 2022-09-29 719 for (bfqq = sync_bfqq; bfqq; bfqq = bfqq->new_bfqq) 0154382317ee69 Jan Kara 2022-09-29 720 if (bfqq->entity.sched_data != 0154382317ee69 Jan Kara 2022-09-29 721 &bfqg->sched_data) 0154382317ee69 Jan Kara 2022-09-29 722 break; 0154382317ee69 Jan Kara 2022-09-29 723 if (bfqq) { 0154382317ee69 Jan Kara 2022-09-29 724 /* 0154382317ee69 Jan Kara 2022-09-29 725 * Some queue changed cgroup so the merge is 0154382317ee69 Jan Kara 2022-09-29 726 * not valid anymore. We cannot easily just 0154382317ee69 Jan Kara 2022-09-29 727 * cancel the merge (by clearing new_bfqq) as 0154382317ee69 Jan Kara 2022-09-29 728 * there may be other processes using this 0154382317ee69 Jan Kara 2022-09-29 729 * queue and holding refs to all queues below 0154382317ee69 Jan Kara 2022-09-29 730 * sync_bfqq->new_bfqq. Similarly if the merge 0154382317ee69 Jan Kara 2022-09-29 731 * already happened, we need to detach from 0154382317ee69 Jan Kara 2022-09-29 732 * bfqq now so that we cannot merge bio to a 0154382317ee69 Jan Kara 2022-09-29 733 * request from the old cgroup. 0154382317ee69 Jan Kara 2022-09-29 734 */ 0154382317ee69 Jan Kara 2022-09-29 735 bfq_put_cooperator(sync_bfqq); 0154382317ee69 Jan Kara 2022-09-29 736 bfq_release_process_ref(bfqd, sync_bfqq); 0154382317ee69 Jan Kara 2022-09-29 737 bic_set_bfqq(bic, NULL, 1); 0154382317ee69 Jan Kara 2022-09-29 738 } 0154382317ee69 Jan Kara 2022-09-29 739 } ea25da48086d3b Paolo Valente 2017-04-19 740 } ea25da48086d3b Paolo Valente 2017-04-19 741 ea25da48086d3b Paolo Valente 2017-04-19 742 return bfqg; ea25da48086d3b Paolo Valente 2017-04-19 743 } ea25da48086d3b Paolo Valente 2017-04-19 744 :::::: The code at line 692 was first introduced by commit :::::: ea25da48086d3bbebf3a2eeff387ea00ed96f5c4 block, bfq: split bfq-iosched.c into multiple source files :::::: TO: Paolo Valente <paolo.valente@linaro.org> :::::: CC: Jens Axboe <axboe@fb.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki