[cgroup:review-tracepoints 2/5] include/linux/kernfs.h:346:19: warning: 'kernfs_path_from_node' used but never defined

* [cgroup:review-tracepoints 2/5] include/linux/kernfs.h:346:19: warning: 'kernfs_path_from_node' used but never defined
@ 2016-08-09  5:43 kbuild test robot
  0 siblings, 0 replies; only message in thread
From: kbuild test robot @ 2016-08-09  5:43 UTC (permalink / raw)
  To: Tejun Heo; +Cc: kbuild-all-JC7UmRfGjtg, cgroups-u79uwXL29TY76Z2rM5mHXA

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-tracepoints
head:   471f89b317a21a78dacaee85957984b9f11e79e4
commit: 66aacea034635a9486262044f8b270c99adf962b [2/5] kernfs: make kernfs_path*() behave in the style of strlcpy()
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        git checkout 66aacea034635a9486262044f8b270c99adf962b
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from include/linux/cgroup.h:18:0,
                    from include/linux/memcontrol.h:22,
                    from include/linux/swap.h:8,
                    from include/linux/suspend.h:4,
                    from arch/x86/kernel/asm-offsets.c:12:
   include/linux/kernfs.h:349:1: error: expected identifier or '(' before '{' token
    { return -ENOSYS; }
    ^
>> include/linux/kernfs.h:346:19: warning: 'kernfs_path_from_node' used but never defined
    static inline int kernfs_path_from_node(struct kernfs_node *root_kn,
                      ^~~~~~~~~~~~~~~~~~~~~
   make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/kernfs_path_from_node +346 include/linux/kernfs.h

3eef34ad Tejun Heo 2014-02-07  340  static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen)
3eef34ad Tejun Heo 2014-02-07  341  { return -ENOSYS; }
3eef34ad Tejun Heo 2014-02-07  342  
9acee9c5 Tejun Heo 2015-08-18  343  static inline size_t kernfs_path_len(struct kernfs_node *kn)
9acee9c5 Tejun Heo 2015-08-18  344  { return 0; }
9acee9c5 Tejun Heo 2015-08-18  345  
5f8ffbe6 Tejun Heo 2016-08-09 @346  static inline int kernfs_path_from_node(struct kernfs_node *root_kn,
5f8ffbe6 Tejun Heo 2016-08-09  347  					struct kernfs_node *kn,
5f8ffbe6 Tejun Heo 2016-08-09  348  					char *buf, size_t buflen);
5f8ffbe6 Tejun Heo 2016-08-09 @349  { return -ENOSYS; }
5f8ffbe6 Tejun Heo 2016-08-09  350  
3eef34ad Tejun Heo 2014-02-07  351  static inline void pr_cont_kernfs_name(struct kernfs_node *kn) { }
3eef34ad Tejun Heo 2014-02-07  352  static inline void pr_cont_kernfs_path(struct kernfs_node *kn) { }

:::::: The code at line 346 was first introduced by commit
:::::: 5f8ffbe607d1bb405d6f57735a4e214879b3d646 kernfs: add dummy implementation of kernfs_path_from_node()

:::::: TO: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
:::::: CC: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

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