tree:   https://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git 
current-work
head:   1ac686f6d1b04b480cd245fb927180e1238bd3ac
commit: 4ece201cfafab298cd89083567403a53f0971635 [2/3] block: add bi_blkg to 
the bio for cgroups
config: x86_64-randconfig-x018-201804 (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
        git checkout 4ece201cfafab298cd89083567403a53f0971635
        # 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:521:55: warning: 'struct blkcg_gq' declared inside 
>> parameter list will not be visible outside of this definition or declaration
    static int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg) { 
return 0; }
                                                          ^~~~~~~~
   include/linux/bio.h:521:12: warning: 'bio_associate_blkg' defined but not 
used [-Wunused-function]
    static int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg) { 
return 0; }
               ^~~~~~~~~~~~~~~~~~

vim +521 include/linux/bio.h

   506  
   507  #define bio_dev(bio) \
   508          disk_devt((bio)->bi_disk)
   509  
   510  #define bio_devname(bio, buf) \
   511          __bdevname(bio_dev(bio), (buf))
   512  
   513  #ifdef CONFIG_BLK_CGROUP
   514  int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state 
*blkcg_css);
   515  int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg);
   516  void bio_disassociate_task(struct bio *bio);
   517  void bio_clone_blkcg_association(struct bio *dst, struct bio *src);
   518  #else   /* CONFIG_BLK_CGROUP */
   519  static inline int bio_associate_blkcg(struct bio *bio,
   520                          struct cgroup_subsys_state *blkcg_css) { return 
0; }
 > 521  static int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg) { 
 > return 0; }
   522  static inline void bio_disassociate_task(struct bio *bio) { }
   523  static inline void bio_clone_blkcg_association(struct bio *dst,
   524                          struct bio *src) { }
   525  #endif  /* CONFIG_BLK_CGROUP */
   526  

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

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