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Re: [PATCH 1/2] f2fs: report error of f2fs_create_root_stats

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Hi Chao,

[auto build test WARNING on f2fs/dev -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/Chao-Yu/f2fs-report-error-of-f2fs_create_root_stats/20151028-175937
config: x86_64-randconfig-x015-201543 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from fs/f2fs/dir.c:13:0:
   fs/f2fs/f2fs.h: In function 'f2fs_create_root_stats':
>> fs/f2fs/f2fs.h:2018:1: warning: no return statement in function returning non-void [-Wreturn-type]
    static inline int __init f2fs_create_root_stats(void) { }
    ^
--
   In file included from fs/f2fs/namei.c:19:0:
   fs/f2fs/f2fs.h: In function 'f2fs_create_root_stats':
>> fs/f2fs/f2fs.h:2018:1: warning: no return statement in function returning non-void [-Wreturn-type]
    static inline int __init f2fs_create_root_stats(void) { }
    ^
   fs/f2fs/namei.c: In function 'f2fs_symlink':
   fs/f2fs/namei.c:414:59: warning: 'p_len' may be used uninitialized in this function [-Wmaybe-uninitialized]
      filemap_write_and_wait_range(inode->i_mapping, 0, p_len - 1);
                                                              ^
--
   In file included from fs/f2fs/node.c:19:0:
   fs/f2fs/f2fs.h: In function 'f2fs_create_root_stats':
>> fs/f2fs/f2fs.h:2018:1: warning: no return statement in function returning non-void [-Wreturn-type]
    static inline int __init f2fs_create_root_stats(void) { }
    ^
   fs/f2fs/node.c: In function 'flush_nat_entries':
   fs/f2fs/node.c:1920:11: warning: 'nat_blk' may be used uninitialized in this function [-Wmaybe-uninitialized]
       raw_ne = &nat_blk->entries[nid - start_nid];
              ^
   fs/f2fs/node.c:1883:25: note: 'nat_blk' was declared here
     struct f2fs_nat_block *nat_blk;
                            ^

vim +2018 fs/f2fs/f2fs.h

  2002	#define stat_inc_inline_xattr(inode)
  2003	#define stat_dec_inline_xattr(inode)
  2004	#define stat_inc_inline_inode(inode)
  2005	#define stat_dec_inline_inode(inode)
  2006	#define stat_inc_inline_dir(inode)
  2007	#define stat_dec_inline_dir(inode)
  2008	#define stat_inc_seg_type(sbi, curseg)
  2009	#define stat_inc_block_count(sbi, curseg)
  2010	#define stat_inc_inplace_blocks(sbi)
  2011	#define stat_inc_seg_count(sbi, type, gc_type)
  2012	#define stat_inc_tot_blk_count(si, blks)
  2013	#define stat_inc_data_blk_count(sbi, blks, gc_type)
  2014	#define stat_inc_node_blk_count(sbi, blks, gc_type)
  2015	
  2016	static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
  2017	static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
> 2018	static inline int __init f2fs_create_root_stats(void) { }
  2019	static inline void f2fs_destroy_root_stats(void) { }
  2020	#endif
  2021	
  2022	extern const struct file_operations f2fs_dir_operations;
  2023	extern const struct file_operations f2fs_file_operations;
  2024	extern const struct inode_operations f2fs_file_inode_operations;
  2025	extern const struct address_space_operations f2fs_dblock_aops;
  2026	extern const struct address_space_operations f2fs_node_aops;

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

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[PATCH 1/2] f2fs: report error of f2fs_create_root_stats Chao Yu <chao2.yu@samsung.com> - 2015-10-28 11:00 +0100
  Re: [PATCH 1/2] f2fs: report error of f2fs_create_root_stats kbuild test robot <lkp@intel.com> - 2015-10-28 11:40 +0100
    RE: [PATCH 1/2] f2fs: report error of f2fs_create_root_stats Chao Yu <chao2.yu@samsung.com> - 2015-10-29 02:20 +0100

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