Re: [PATCH 1/2] nilfs2: use i_blocksize()

[kbuild test robot]

Hi Geliang,

[auto build test ERROR on v4.9-rc8]
[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/Geliang-Tang/nilfs2-use-i_blocksize/20170121-114142
config: x86_64-randconfig-n0-01211226 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   fs/nilfs2/btree.c: In function 'nilfs_btree_node_size':
>> fs/nilfs2/btree.c:122:2: error: implicit declaration of function 'i_blocksize' [-Werror=implicit-function-declaration]
     return i_blocksize(btree->b_inode);
     ^
   cc1: some warnings being treated as errors
--
   fs/nilfs2/alloc.c: In function 'nilfs_palloc_groups_per_desc_block':
>> fs/nilfs2/alloc.c:37:2: error: implicit declaration of function 'i_blocksize' [-Werror=implicit-function-declaration]
     return i_blocksize(inode) /
     ^
   cc1: some warnings being treated as errors

vim +/i_blocksize +122 fs/nilfs2/btree.c

   116	{
   117		node->bn_nchildren = cpu_to_le16(nchildren);
   118	}
   119	
   120	static int nilfs_btree_node_size(const struct nilfs_bmap *btree)
   121	{
 > 122		return i_blocksize(btree->b_inode);
   123	}
   124	
   125	static int nilfs_btree_nchildren_per_block(const struct nilfs_bmap *btree)

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