Hi Dennis, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on block/for-next] [also build test WARNING on v4.19-rc1 next-20180831] [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/Dennis-Zhou/blkcg-ref-count-refactor-cleanup-blkcg-avg_lat/20180831-161742 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: x86_64-randconfig-x019-201834 (attached as .config) compiler: gcc-7 (Debian 7.3.0-16) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): In file included from include/linux/blkdev.h:21:0, from block//partitions/check.h:3, from block//partitions/check.c:22: >> include/linux/bio.h:566:17: warning: 'struct blkcg_gq' declared inside parameter list will not be visible outside of this definition or declaration struct blkcg_gq *blkg) { return 0; } ^~~~~~~~ vim +566 include/linux/bio.h 555 556 #ifdef CONFIG_BLK_CGROUP 557 int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css); 558 int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg); 559 int bio_associate_create_blkg(struct request_queue *q, struct bio *bio); 560 void bio_disassociate_task(struct bio *bio); 561 void bio_clone_blkcg_association(struct bio *dst, struct bio *src); 562 #else /* CONFIG_BLK_CGROUP */ 563 static inline int bio_associate_blkcg(struct bio *bio, 564 struct cgroup_subsys_state *blkcg_css) { return 0; } 565 static inline int bio_associate_blkg(struct bio *bio, > 566 struct blkcg_gq *blkg) { return 0; } 567 static inline int bio_associate_create_blkg(struct request_queue *q, 568 struct bio *bio) { return 0; } 569 static inline void bio_disassociate_task(struct bio *bio) { } 570 static inline void bio_clone_blkcg_association(struct bio *dst, 571 struct bio *src) { } 572 #endif /* CONFIG_BLK_CGROUP */ 573 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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