tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: bd317843995067c2f78bd884340fcd0a27acab8d commit: ac91631e9ef7b530c02e40d10085072c08fb4a0a [23675/23694] blk-io-hierarchy: support new stage for bio lifetime config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240905/202409051155.tjBfzaXC-lkp@i...) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240905/202409051155.tjBfzaXC-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/202409051155.tjBfzaXC-lkp@intel.com/

All warnings (new ones prefixed by >>):

In file included from block/blk-io-hierarchy/iodump.c:15: In file included from include/linux/blktrace_api.h:5: In file included from include/linux/blkdev.h:16: include/linux/pagemap.h:425:21: warning: cast from 'int (*)(struct file *, struct page *)' to 'filler_t *' (aka 'int (*)(void *, struct page *)') converts to incompatible function type [-Wcast-function-type-strict] 425 | filler_t *filler = (filler_t *)mapping->a_ops->readpage; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

...

block/blk-io-hierarchy/iodump.c:571:7: warning: no previous prototype for function '__bio_stage_hierarchy_start' [-Wmissing-prototypes]

571 | void *__bio_stage_hierarchy_start(struct bio_stage_dump_data *bstage_ddata, | ^ block/blk-io-hierarchy/iodump.c:571:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 571 | void *__bio_stage_hierarchy_start(struct bio_stage_dump_data *bstage_ddata, | ^ | static 2 warnings generated.

vim +/__bio_stage_hierarchy_start +571 block/blk-io-hierarchy/iodump.c

570

571 void *__bio_stage_hierarchy_start(struct bio_stage_dump_data *bstage_ddata,

572 loff_t *pos) 573 { 574 struct pos_data *pdata = &bstage_ddata->pdata; 575 struct rq_dump_data *rq_ddata = &bstage_ddata->rq_ddata; 576 577 retry: 578 if (stage_is_bio(pdata->stage)) { 579 struct list_head *list; 580 struct bio_dump_data *bio_ddata = 581 get_bio_stage_ddata(rq_ddata->q, pdata->stage); 582 583 if (!bio_ddata) { 584 bio_stage_start_next_stage(bstage_ddata, pos); 585 goto retry; 586 } 587 588 spin_lock_irq(&bio_ddata->lock); 589 list = seq_list_start(&bio_ddata->head, pdata->count); 590 if (list) 591 return list; 592 593 spin_unlock_irq(&bio_ddata->lock); 594 bio_stage_start_next_stage(bstage_ddata, pos); 595 goto retry; 596 } 597 598 if (pdata->stage == STAGE_BIO && 599 __rq_hierarchy_start(rq_ddata, pdata->count)) 600 return bstage_ddata; 601 602 return NULL; 603 } 604