Re: [PATCH 03/14] blk-mq: introduce blk_mq_dispatch_rq_from_ctxs()

kbuild test robot
2017-08-02T17:20:39Z

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Hi Ming,

[auto build test ERROR on block/for-next]
[also build test ERROR on v4.13-rc3 next-20170802]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Ming-Lei/blk-mq-sched-fix-SCSI-MQ-performance-regression/20170801-031007
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: x86_64-randconfig-b0-08022356 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All error/warnings (new ones prefixed by >>):

block/blk-mq.c: In function 'blk_mq_flush_busy_ctxs':
>> block/blk-mq.c:861: error: unknown field 'list' specified in initializer
>> block/blk-mq.c:861: warning: missing braces around initializer
block/blk-mq.c:861: warning: (near initialization for 'data.<anonymous>')
block/blk-mq.c: In function 'blk_mq_dispatch_rq_from_ctxs':
>> block/blk-mq.c:872: error: unknown field 'rq' specified in initializer
block/blk-mq.c:872: warning: missing braces around initializer
block/blk-mq.c:872: warning: (near initialization for 'data.<anonymous>')

vim +/list +861 block/blk-mq.c

22e09fd59 Ming Lei 2017-08-01 852
320ae51fe Jens Axboe 2013-10-24 853 /*
1429d7c94 Jens Axboe 2014-05-19 854 * Process software queues that have been marked busy, splicing them
1429d7c94 Jens Axboe 2014-05-19 855 * to the for-dispatch
1429d7c94 Jens Axboe 2014-05-19 856 */
2c3ad6679 Jens Axboe 2016-12-14 857 void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list)
1429d7c94 Jens Axboe 2014-05-19 858 {
4b5ef3bbb Ming Lei 2017-08-01 859 struct ctx_iter_data data = {
88459642c Omar Sandoval 2016-09-17 860 .hctx = hctx,
88459642c Omar Sandoval 2016-09-17 @861 .list = list,
88459642c Omar Sandoval 2016-09-17 862 };
1429d7c94 Jens Axboe 2014-05-19 863
88459642c Omar Sandoval 2016-09-17 864 sbitmap_for_each_set(&hctx->ctx_map, flush_busy_ctx, &data);
1429d7c94 Jens Axboe 2014-05-19 865 }
2c3ad6679 Jens Axboe 2016-12-14 866 EXPORT_SYMBOL_GPL(blk_mq_flush_busy_ctxs);
1429d7c94 Jens Axboe 2014-05-19 867
22e09fd59 Ming Lei 2017-08-01 868 struct request *blk_mq_dispatch_rq_from_ctxs(struct blk_mq_hw_ctx *hctx)
22e09fd59 Ming Lei 2017-08-01 869 {
22e09fd59 Ming Lei 2017-08-01 870 struct ctx_iter_data data = {
22e09fd59 Ming Lei 2017-08-01 871 .hctx = hctx,
22e09fd59 Ming Lei 2017-08-01 @872 .rq = NULL,
22e09fd59 Ming Lei 2017-08-01 873 };
22e09fd59 Ming Lei 2017-08-01 874
22e09fd59 Ming Lei 2017-08-01 875 sbitmap_for_each_set(&hctx->ctx_map, dispatch_rq_from_ctx, &data);
22e09fd59 Ming Lei 2017-08-01 876
22e09fd59 Ming Lei 2017-08-01 877 return data.rq;
22e09fd59 Ming Lei 2017-08-01 878 }
22e09fd59 Ming Lei 2017-08-01 879

:::::: The code at line 861 was first introduced by commit
:::::: 88459642cba452630326b9cab1c651e09577d4e4 blk-mq: abstract tag allocation out into sbitmap library

:::::: TO: Omar Sandoval <osandov@fb.com>
:::::: CC: Jens Axboe <axboe@fb.com>

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