linux-kernel - Re: [PATCH 1/5] mm: migrate: Add mode parameter to support additional page copy routines.

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Date:   Wed, 23 Nov 2016 03:56:29 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Zi Yan <zi.yan@...t.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org, minchan@...nel.org,
        vbabka@...e.cz, mgorman@...hsingularity.net,
        kirill.shutemov@...ux.intel.com, n-horiguchi@...jp.nec.com,
        khandual@...ux.vnet.ibm.com, Zi Yan <zi.yan@...rutgers.edu>,
        Zi Yan <ziy@...dia.com>
Subject: Re: [PATCH 1/5] mm: migrate: Add mode parameter to support
 additional page copy routines.

Hi Zi,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.9-rc6 next-20161122]
[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/Zi-Yan/Parallel-hugepage-migration-optimization/20161123-022913
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

   include/linux/compiler.h:253:8: sparse: attribute 'no_sanitize_address': unknown attribute
>> fs/f2fs/data.c:1938:26: sparse: not enough arguments for function migrate_page_copy
   fs/f2fs/data.c: In function 'f2fs_migrate_page':
   fs/f2fs/data.c:1938:2: error: too few arguments to function 'migrate_page_copy'
     migrate_page_copy(newpage, page);
     ^~~~~~~~~~~~~~~~~
   In file included from fs/f2fs/data.c:1893:0:
   include/linux/migrate.h:45:13: note: declared here
    extern void migrate_page_copy(struct page *newpage, struct page *page,
                ^~~~~~~~~~~~~~~~~

vim +1938 fs/f2fs/data.c

5b7a487c Weichao Guo 2016-09-20  1922  	if (atomic_written) {
5b7a487c Weichao Guo 2016-09-20  1923  		struct inmem_pages *cur;
5b7a487c Weichao Guo 2016-09-20  1924  		list_for_each_entry(cur, &fi->inmem_pages, list)
5b7a487c Weichao Guo 2016-09-20  1925  			if (cur->page == page) {
5b7a487c Weichao Guo 2016-09-20  1926  				cur->page = newpage;
5b7a487c Weichao Guo 2016-09-20  1927  				break;
5b7a487c Weichao Guo 2016-09-20  1928  			}
5b7a487c Weichao Guo 2016-09-20  1929  		mutex_unlock(&fi->inmem_lock);
5b7a487c Weichao Guo 2016-09-20  1930  		put_page(page);
5b7a487c Weichao Guo 2016-09-20  1931  		get_page(newpage);
5b7a487c Weichao Guo 2016-09-20  1932  	}
5b7a487c Weichao Guo 2016-09-20  1933  
5b7a487c Weichao Guo 2016-09-20  1934  	if (PagePrivate(page))
5b7a487c Weichao Guo 2016-09-20  1935  		SetPagePrivate(newpage);
5b7a487c Weichao Guo 2016-09-20  1936  	set_page_private(newpage, page_private(page));
5b7a487c Weichao Guo 2016-09-20  1937  
5b7a487c Weichao Guo 2016-09-20 @1938  	migrate_page_copy(newpage, page);
5b7a487c Weichao Guo 2016-09-20  1939  
5b7a487c Weichao Guo 2016-09-20  1940  	return MIGRATEPAGE_SUCCESS;
5b7a487c Weichao Guo 2016-09-20  1941  }
5b7a487c Weichao Guo 2016-09-20  1942  #endif
5b7a487c Weichao Guo 2016-09-20  1943  
eb47b800 Jaegeuk Kim 2012-11-02  1944  const struct address_space_operations f2fs_dblock_aops = {
eb47b800 Jaegeuk Kim 2012-11-02  1945  	.readpage	= f2fs_read_data_page,
eb47b800 Jaegeuk Kim 2012-11-02  1946  	.readpages	= f2fs_read_data_pages,

:::::: The code at line 1938 was first introduced by commit
:::::: 5b7a487cf32d3a266fea83d590d3226b5ad817a7 f2fs: add customized migrate_page callback

:::::: TO: Weichao Guo <guoweichao@...wei.com>
:::::: CC: Jaegeuk Kim <jaegeuk@...nel.org>

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