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SubjectRe: [PATCH BUGFIX V4] block: add missing group association in bio-cloning functions
Hi,

[auto build test WARNING on block/for-next]
[also build test WARNING on v4.7 next-20160726]
[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/Paolo-Valente/block-add-missing-group-association-in-bio-cloning-functions/20160727-005044
base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: x86_64-randconfig-x015-201630 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

In file included from block/bio.c:20:0:
include/linux/bio.h: In function 'bio_clone_blkcg_association':
>> include/linux/bio.h:480:30: warning: 'return' with a value, in function returning void
struct bio *src) { return 0; }
^
include/linux/bio.h:479:20: note: declared here
static inline void bio_clone_blkcg_association(struct bio *dst,
^~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/return +480 include/linux/bio.h

464 void zero_fill_bio(struct bio *bio);
465 extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *);
466 extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
467 extern unsigned int bvec_nr_vecs(unsigned short idx);
468
469 #ifdef CONFIG_BLK_CGROUP
470 int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
471 int bio_associate_current(struct bio *bio);
472 void bio_disassociate_task(struct bio *bio);
473 void bio_clone_blkcg_association(struct bio *dst, struct bio *src);
474 #else /* CONFIG_BLK_CGROUP */
475 static inline int bio_associate_blkcg(struct bio *bio,
476 struct cgroup_subsys_state *blkcg_css) { return 0; }
477 static inline int bio_associate_current(struct bio *bio) { return -ENOENT; }
478 static inline void bio_disassociate_task(struct bio *bio) { }
479 static inline void bio_clone_blkcg_association(struct bio *dst,
> 480 struct bio *src) { return 0; }
481 #endif /* CONFIG_BLK_CGROUP */
482
483 #ifdef CONFIG_HIGHMEM
484 /*
485 * remember never ever reenable interrupts between a bvec_kmap_irq and
486 * bvec_kunmap_irq!
487 */
488 static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags)

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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