[vfs:for-next 112/127] fs/nfs/dir.c:722:2: error: implicit declaration of function 'page_put'

[vfs:for-next 112/127] fs/nfs/dir.c:722:2: error: implicit declaration of function 'page_put'

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-next
head:   50cc3b2ebc27a471aeead5e55d17f1914c3e94bf
commit: 4ca3616f6dfadf9f0824b3d793eacc84cf4e7586 [112/127] nfs: switch to ->iterate_shared()
config: x86_64-lkp (attached as .config)
compiler: gcc-4.9 (Debian 4.9.3-14) 4.9.3
reproduce:
        git checkout 4ca3616f6dfadf9f0824b3d793eacc84cf4e7586
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the vfs/for-next HEAD 50cc3b2ebc27a471aeead5e55d17f1914c3e94bf builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   fs/nfs/dir.c: In function 'cache_page_release':
>> fs/nfs/dir.c:722:2: error: implicit declaration of function 'page_put' [-Werror=implicit-function-declaration]
     page_put(desc->page);
     ^
   cc1: some warnings being treated as errors

vim +/page_put +722 fs/nfs/dir.c

   716	}
   717	
   718	static
   719	void cache_page_release(nfs_readdir_descriptor_t *desc)
   720	{
   721		nfs_readdir_clear_array(desc->page);
 > 722		page_put(desc->page);
   723		desc->page = NULL;
   724	}
   725	

---
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